Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a94d1dd31f3822…

MALICIOUS

PDF

88.8 KB Created: 2021-06-28 06:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1b406e0b5aa85b8674cfc0ea99146fb5 SHA-1: ce867c0d77c83323e610ba3aee7c1f6eba1b4aed SHA-256: 97a94d1dd31f38223c1ae48aade6d83b306c31fc9e93ad6a3bd3278264283df5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It impersonates the brand 'Apple' and contains a link farm pointing to compromised WordPress upload storage, suggesting a credential phishing attempt. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=roblox+unlimited+robux+apk+2021.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/u446ek2vohvqv1k82kqm1mhql2/81599917548.pdf In PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/397d8ecb96dd9ddf67d98d55dc6cfbee/17728723581.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/85593680677.pdfIn PDF document text
    • http://termitecontrolservicebd.com/ck/upload/files/xadosapal.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/seposeretezojilowag.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3160d2631c---65186925004.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d237d1818c0---42412216118.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/65ia0jq4mmiuseudg8v1bo1897/kikugemutolerotos.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f0174241eb96d3a853c96c6ca4e0102b/40368852281.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/91dd1e6cd5cb22cbaefda980e234a1a0/56758815612.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/1v44trld6stvimn3mn42vhbp03/90487925011.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608095687e89f---4303142057.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/77b0eb2093f36e64f4195b986db565b0/rajazavulib.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/617eb179c27c29885f8fda481757f0c1/vetelakom.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c411628dd79---welajagopat.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/53884226228.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a918b738ae4---17111915650.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///bisevazu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6c9550c9f090c84d65974420db47db88/pexomapizubuwupulaki.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074498f65e6e---64443779624.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/sanemubosadaxezumakorux.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/46246ebafff053314943e9ab9ef28039/21845831549.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/dopokilizodemidowen.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/81f3185afef9a6105a7713ce6463fcb3/jidikuzelu.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16070eea847e66---gebusimuwasuraxeka.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/e6d40a654b343e749e828a5c2769d1cf/1263791182.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/fb4693daf50e8e1020ad458447399fb4/48447935881.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=roblox+unlimited+robux+apk+2021PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E65 11156 bytes
SHA-256: eabd1122c5431b9128d38c14d5ab05fc2e2fe0ada86c2617725750039c3af83d
font_02_sfnt_off00012848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12848 17548 bytes
SHA-256: 5f5c5bf366ae0406fa0f8d785a7e1d427e7cc21951e3ac69893c171c64c518a2