Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a54d8c032b071e…

MALICIOUS

PDF

87.1 KB Created: 2021-07-20 13:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0b517c50dd287dadad2a251cc6de91e SHA-1: 6c5aa931089dda5466625c0697e26fa2bd100a04 SHA-256: f2a54d8c032b071e8e61c368cbff5a22a509676980307455f8c6e52904d1a934
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://go2germany.ru/files/file/vesoleba.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/250db2ac221e2343505773a9f4fa212c/jewugevejiredumibijazijib.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4aa8802c9effa6a0acc1c91c4b7bdaf8/40770371329.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/b23f9qu770rhkdohoa3e59jqrv/4920124834.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b1feac6c4---dafajik.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/5bd90f01852492755f46c29a8a5f5499/tidivutunatagalepelosa.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/4b567a704027dc84c974ecd63f39f102/sasopasorejeseradunejoza.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1b33ebf19---95796651276.pdf
    • http://lamekatus.ee/uploads/ckeditor/files/dujexuseg.pdf
    • https://fibra-optica.ro/ckfinder/userfiles/files/38316579269.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/sebofavedimo.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070f707c7a42---difuvulefodugit.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/netawedabebit.pdf
    • https://weeb.nu/userfiles/file/xaweniwipi.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a3b65a05---88917059635.pdf
    • http://morethancars.nl/uploads/edytor/file/tirezukat.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/de4d535aa274adbcde6de0c470bc144c/83850090778.pdf
    • http://mishelik.ru/userfiles/file/digat.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d66ac62a35---42536620028.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1e4360760---xetozanoguvebivasezuberi.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16092b4363f3d0---1875398251.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=is+it+safe+to+soak+a+dog%27s+paw+in+epsom+salt
    • 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_off0000f0e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 16792 bytes
font_01_sfnt_off000108f7.bin
4af552645fa0e0713ea559b04ca3cdc8b14f6a816af3f49a3a193e94907907ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 17532 bytes
font_02_sfnt_off00013629.bin
f6223767126ae371dbd4abc1cafc70c3800f4cbc53935a61fcd0dd25a2c4c7c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13629 10904 bytes