Malicious PDF — malware analysis report

Static analysis result for SHA-256 46331e91587706c2…

MALICIOUS

PDF

76.0 KB Created: 2021-06-05 00:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a75d2edce495ce49df5059aed1e65e8a SHA-1: c3e67ca3661b9d70b34b6392b8325b171897f362 SHA-256: 46331e91587706c261dc8154976fd11ba7a99fe5aed04443e5915909a230738e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with multiple URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crewmak.ru/uplcv?utm_term=dragon+city+hack+gems+pc
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607865ebde081---pagasuzubepuxolisimimade.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tste1tdgpirfboijpt16rf81sl/15240599348.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce4cde5705---31205178987.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/b52d20a72bbd5f91bd511b36b1727eb6/49039875440.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c0869dba---74153194461.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/4198b1b31d12158293090b7a2512c2eb/levulisusefukuvidiferepu.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a08931d494---15292740110.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7eb1069f6---fivilajunezegaxodurex.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607df42128542---35508193314.pdf
    • http://goref.ru/files/file/56296623770.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072f75fc50f4---81136370735.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820c9d2d758---87318899004.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/3efhrhtvmll1ebg7m3ibrfe754/99752295044.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/eaf508aaef722dc8a69373bf854abe79/85073462737.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e072.bin
26bec7b41cdeb72d82987ab9b6c38e5df4a4bcb4eac2197013e9be987652d356		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE072 5268 bytes
font_01_sfnt_off0000f231.bin
97fd3ebbfdc21b980ebe00d7e9eb83525bb17ec6152f31762e9b6e3962ce05c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 10456 bytes
font_02_sfnt_off00011525.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11525 4324 bytes

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