Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f00e440e1b3efd…

MALICIOUS

PDF

146.4 KB Created: 2021-07-02 04:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f18c706fd44649fbb195e0a0637b773a SHA-1: 975044aa3e5a6a8b3cddf702227772bb76c6d32a SHA-256: 38f00e440e1b3efd0cd4ae294e374050752507392f796046286e03589548b14a
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9645

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 http://salinasouth.com/clients/11073/File/bilininebugazit.pdf
    • https://mttrasportisrl.it/dati/upload/file/49533357225.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/xidugobu.pdf
    • https://bahamianbrewery.com/ckfinder/userfiles/files/46003303883.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160de38b40da86---27243561672.pdf
    • http://altaprecision.com/userfiles/file/81302004872.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/d0a4a692f994bac2af826f196b5407d1/96772484944.pdf
    • http://iberia-ex.com/images/blog//file/1386071590.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160979309954ff---11283045517.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2ddaba69100bece861d8ef1e12511781/munudipuwilaginid.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/25b50a6dcdb39abdc6d4f53e515afa12/44045409324.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/43d693c0c9358f3d718d4e25d66c18bb/zabapetivozol.pdf
    • http://strandedtattoo.net/file/rikuxawojezofefuvemuwuza.pdf
    • http://fipjp.com/userfiles/file/36481210618.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084e8ed50150---73026862836.pdf
    • http://poiskvod.ru/images/file/8600665276.pdf
    • http://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/majasidasuvukawojodij.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea40061834---27113054650.pdf
    • https://sealskinz.ru/files/file/duxekubedabavaniwanif.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b811155be1f---47712222474.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9fdbf3c5---41863062191.pdf
    • http://puginternational.com/ckfinder/userfiles/files/6050247332.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=mechanics+of+materials+james+gere+solution+manual
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b53b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B53B 16792 bytes
font_01_sfnt_off0001cd4c.bin
3108d61b2da1918d99a90e856c479b5d8c01ba231e7a2cb0053438587654845a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD4C 16060 bytes
font_02_sfnt_off0001e24f.bin
bb5b02ea85708bcc881b731de0e0e90644774383f8758fad54a4bc9fb9db5281
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E24F 3648 bytes
font_03_sfnt_off0001f048.bin
28d5bf839174a779296ee42dfa2121c68e33092aeeb762376300df0655c0f3eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F048 17916 bytes
font_04_sfnt_off00021f18.bin
772dcee7ba10e5c11eca38995dc01cf6821f583930c4db3b0cea92165eb9e4f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x21F18 11004 bytes