Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c2d014444923a6…

MALICIOUS

PDF

65.6 KB Created: 2021-05-01 21:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c71e7f425a03eea274def40b27fcd465 SHA-1: 54e099aaafcb369139421b16ee76871fbcbe7ccb SHA-256: 92c2d014444923a63dc8ca1555383dffcb63005b5618a13a9a9fba53dbdc186a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into phishing scams or malware downloads. The document body itself is heavily obfuscated and appears to be junk data, reinforcing the malicious intent of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787a0b4ddbb---gebajufofageki.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608441ff3152a---sufefi.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/baab84f1b25f2f960950b0bbd61b4208/62454134268.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f73df4c82c---38414278093.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/59500437f1c35e48cc9a80f1f136995b/13784098119.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f85218ac---pijanuxo.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c741f1d45c---jimikuwonorar.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/0f77ddc3b09986573d92ac6ab43bb30e/zewelenozej.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/8c24cd7903b3083271172024ff7b01b0/jonilipewukagabuv.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802ed082710---fadebawiwiban.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798ba2c4b22---82439049984.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c9c7c48f912b95d3a6290c12bf30d02b/17660903778.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ee7a8063c2376abf3149006469004f6e/wanixalarejabixemolo.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/hd5vh5kderpv08mqoe9krnv951/zewekefofixizusak.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca004589b9---dezugabeku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+chemistry+of+fireworks+worksheet+answers
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc5.bin
5935dc42b9e904a4bec1474eaf5df7e0c4e9c5aaa7a06fa4b09797de67c709e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC5 5296 bytes
font_01_sfnt_off0000deb7.bin
237e5920ff082230e903d23d1585da3692e5e8aa0b72ec4a06abba430ae2afd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 10320 bytes

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