Malicious PDF — malware analysis report

Static analysis result for SHA-256 095260894623be6c…

MALICIOUS

PDF

79.7 KB Created: 2021-06-29 19:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5a615cb5e02c4e2cda99a0f5faad8048 SHA-1: 432937cffcd863e7dab84757d8b543fb230f0787 SHA-256: 095260894623be6c19c407515c2d0cfd2b785bc7df22c0fdde9bb3c90a40a5b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting. While no scripts were explicitly extracted, the nature of the links and the heuristics strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/h2eah7ut2nfjl89ijredj1a567/32808734500.pdf In PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/250475c2c0eec4d3b763fb1599bcac56/5383621261.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/soruzoguramuxorotadok.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/70547926493.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/787f8379fa93fe33c26cb4000866c0fe/72877516873.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/ig8612deqdolui1s1ooh5f2r6b/zomulisibageni.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/5e9d8045bf35aa618182a54ef95d32a6/90696862429.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/doteke.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/83853045826.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/88456041915.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/3528dce29c990857daf6ce66f6906738/61286550968.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/2665ad3d8b15a169ce9f737bb0c23aa2/fifigejurojisit.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/66282631183.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/c8rdg7rclh83p7vkqddeps9iec/nupogosilupiz.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/37390051307.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/82408561167.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/15fckb5q49sd0o3suq8ci92pud/towawujogapetipomusunodu.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9bf3b9c39---gomefabomolobuwatukizalun.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160779eb96d5e7---25899288951.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b912235c5f0ff4c552f70dcf47ac7916/sirebo.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/4bc9811c95cd3a83e89772e838edcaad/lexeremiletusalikesivu.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/aat6k8p7luv139vabj6k5lig9f/gegifogenujazad.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160944f2c8ae19---xipodulodosilavixaxe.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/37933639742.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c3df8039b7e356381dec0e815ca49b84/gidazozukaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=dividing+mixed+numbers+by+whole+numbersPDF 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_off0000d3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 16912 bytes
SHA-256: 534a8dca4845c257a90780618d021ecc0987f87a64b14e5a3ffbe747fe1b3f04
font_01_sfnt_off0001000a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 11044 bytes
SHA-256: ba70f2ad521c2c8fb21f934ef133cf01e9aa8c61fb4ce96bb2a8e8659f7558a4
font_02_sfnt_off0001195f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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