Malicious PDF — malware analysis report

Static analysis result for SHA-256 9954cfb7e78851b8…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 15:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 029550b39fdb83caeeef051a19ecd3ac SHA-1: 27d98b494103d26b9075f6a9930ae5c3c698637a SHA-256: 9954cfb7e78851b8e3917b6c60168aafcb0a2750c9d26e032c5a5bf5c708d69f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised websites, many of which host other PDFs. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f3ee3d9cd690824b66345bc248d2c4ca/mugezobikizewowon.pdf In PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/srajduaoqkkj7deb5mjdmq8c81/98295176621.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160837902da0c9---84538527584.pdfIn PDF document text
    • https://123natura.com/stockages/files/87107769196.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/39b9b61b622342fb3e6bab28e83002c4/sabajigivunilewetu.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2475fa39be---21631261280.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/potegemikixop.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/gagofowekixejuwotuwav.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/8hrqr1pbkjjm96fljor45oebrb/logegazurazudir.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/tuvawowasosabi.pdfIn PDF document text
    • http://hotstamping.pl/files/file/44993049087.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/zerogowon.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098acfca076e---27945410219.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/52946384039.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/3aabdb2ca7c1744916cad36d91a62d15/5218486267.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/99834495356.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/24058076121.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4708007cf3---wotedopaxitirot.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098578e8aea1---97906900096.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210531105635.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/71dbd069bc3c9afa202bf8437e92901e/26512017960.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b8e5aca267cca09e3cd13b11ccfee304/25113923463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=hydrogen+shows+similarity+with+alkali+metals+as+well+as+halogensPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 17272 bytes
SHA-256: 08ae2b07b0f6590006467f3acccda83f4072dbcc25f0f5b168cbca5e9c06db74
font_01_sfnt_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD8 10976 bytes
SHA-256: 7d39df4f829028d982adcc3f5cfe01d5bc8ee6865de04f881134034004b677eb

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