Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda620175e994321…

MALICIOUS

PDF

89.3 KB Created: 2021-06-25 18:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b46cdff63b1c6dd40123a1f626f1d720 SHA-1: d8a03a705b6a0a3e98291b298c4316061776605d SHA-256: fda620175e9943218d3bf5de34e836c2f9e37bc0d5d030fcbbb14a9583bc0c7c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL findings are sufficient to infer a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://peterdegendt.be/file/53831131626.pdf
    • https://audit-advisers.com/userfiles/file/bemipafuronuworebodokoxas.pdf
    • http://alacarte-design.de/userfiles/file/rirerilikogizajuje.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20b5eba15---futamilaxasatojekuv.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c760e85c2---66337840668.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/1mo76c6rvpl9ul5576p4nc7l3v/ruwadet.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078945a92a73---64165176886.pdf
    • https://ayurvedaemart.com/uploads/file/xupizelu.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d97c3715fc---wepebedibedirevigelinuwe.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/1a20cbc7818f67f105362bec420f649e/tawuzuxij.pdf
    • http://4seasonstours.in/userfiles/file/zuzasebukitafova.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/sofijigogabolodisojagit.pdf
    • https://nhatngudongkinh.com/upload/ckupload/files/75474358153.pdf
    • http://jngf.cn/files/file/nalon.pdf
    • https://raljob.com/userfiles/file/83621914982.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fe65cbc60---90231888911.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/8ge14e6gh202q9j6llb40mvcim/jefinor.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c09e75a2db---rujawidovur.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/2a204cf5b29687e0d846eeba969277b6/baxotixiri.pdf
    • https://thefertilizerequipment.com/d/files/zunekejuxufuzuvuvebure.pdf
    • https://xlspandoek.nl/userfiles/file/39429141529.pdf
    • http://doks-films.com/pcms/content/file/34729335468.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/dd2toupo43qr4dn2m0jvsg26te/winedamafoluverifu.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/q6aco0ar9itp8cjquipiteeav4/sumupiminulasulabem.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+take+passport+photo+at+home+with+iphone
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f966.bin
4a9c9262e96a384d42d8dfc0f94433f0fccaa98eb2b7ba2e6e129e083c982b65
pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 10640 bytes
font_01_sfnt_off000111a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 16792 bytes
font_02_sfnt_off000129b7.bin
5f93726ca3e5717038580123d68f0ddbe24b0afa33684a352ff785c57c44b38b
pdf-font-stream PDF embedded font (sfnt) at offset 0x129B7 17360 bytes