Malicious PDF — malware analysis report

Static analysis result for SHA-256 1074d3d9f43d63aa…

MALICIOUS

PDF

92.2 KB Created: 2021-07-31 17:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e0f4ea82c93443cb9218d4dd26be1b5a SHA-1: 646b958ff9ae0894e355542073f2aae688ae6f03 SHA-256: 1074d3d9f43d63aab664227608964aabd949c4ee23e2b74d43a1cf4163a52167
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs, many of which point to compromised CMS uploads or IP addresses, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607579d65dd92---begalowised.pdf In PDF document text
    • http://157.230.241.115/image/upload/File/sikutozakagikuj.pdfPDF link annotation
    • http://tokyo-sanritsu.com/userfiles/file/69464547926.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608f982b6c145---zewosonesadijikixozitu.pdfIn PDF document text
    • http://belst.by/upload/file/35288874315.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/gawonivavimewu.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/zevizagojuwamepusuvipanis.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/25328623732.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/tobijagakipufu.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/vmqimribct9nk2ecl3aeh45o25/tujopelikigowuzozifisonan.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/56fa6a90b1a4b47631ec41e4e69f572e/ladujibeloz.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/61673004290.pdfIn PDF document text
    • https://hirurgija.me//files/87468220267.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e2ad0c391---zepodikefojupa.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/is91aburaok3ju9a2gp51jnjn5/pufade.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eec576ca3f---kokodidateburikepinewixev.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/t264uu6u7nacc3os89370rb5o4/11726552298.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/of7baq3emo1loa0unpq2trbeoo/50588193945.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9e80a4e966d4ab0ac1e5fc5b384e962b/18943222674.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d311b96647d---gobijirozes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+add+addictive+keys+to+abletonPDF 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_off00010236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 17608 bytes
SHA-256: 6765da06a08c30ab58a0025dd8976841067971da3b2f7f01196f0c686212c59d
font_01_sfnt_off00013069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14880 10752 bytes
SHA-256: 64d221e11b83ab196e91c8d6f8db286191f8d1d65a0264348d22687b5ab2a7e3

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