Malicious PDF — malware analysis report

Static analysis result for SHA-256 2874faad633fdd0f…

MALICIOUS

PDF

135.2 KB Created: 2021-09-07 01:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 983da59258ab6b91c681040ab2c55c7d SHA-1: d66bb947be864345c86f2eb3eab9d52558b62db7 SHA-256: 2874faad633fdd0f04d768d3f1f33c9bc8de453f45be8cd3f2dd80d1cf167c79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9388

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dcmheavyequipment.com/admin/images/file/vuzisowuvaridejak.pdf In PDF document text
    • http://anandamsanyal.com/userfiles/file/46377507339.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/55773057349.pdfIn PDF document text
    • https://fotinepmuveszeti.hu/kovagoors/uploads/files/35403427061.pdfIn PDF document text
    • http://blueyee.com/upload/file/171345232403.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210721043537.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/42622724229.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/fadulosupojikovurez.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/figajeku.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/kakufa.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/6156e3b188fd037785763b1d95416e9c/26675170273.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/53334075375.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/nekoxepesuzaxopugepa.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/hm5i2hjju4sf9qrb6ec347q6ad/gulodenig.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/016ac4a90a37d6f6a93f5e5e08b35c1e/25928888795.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/tadokil.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/xujasozej.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/3b47d545e420b31a1b0288b901604678/74075412013.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/e14a8cd60517f9fbb72c8230a9064c15/nezezararofobip.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/71575176331.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba2ab5d9f6---fudake.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/35696605986.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///jogigeju.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/patopezuzepixenemegafif.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160931e7dd49db---19437145072.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/36129240106.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/13012517386.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=fermat%27s+last+theorem+proof+andrew+wiles+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19965 22600 bytes
SHA-256: 12cebed232f248ebec89002a2aa6233ce86ee4ed9111c89a60687dda972a2a1b
font_01_sfnt_off0001d4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4E6 1684 bytes
SHA-256: 9c928bf144e3eec6b0e52ae2bba533670589b2228405e28e178bb89e049a64b1
font_02_sfnt_off0001dce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4F9 10860 bytes
SHA-256: d9abfac0bd4b0946798c4843878e3772644fed0c7f34c0637212e227c4f706c7

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