Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafd83205272db31…

MALICIOUS

PDF

83.8 KB Created: 2021-06-28 04:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c14ec62ffe36e48718da15e2afe6e343 SHA-1: 791f230db21a7525f81453580fa0a5d5e87620aa SHA-256: bafd83205272db3168c5e1bf5b9ecb84614ec50338dd2bb8127b1112ed899aed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress sites, a common tactic for hosting malicious content or phishing lures. While no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae292e379ed---58478541835.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c03af211a17---26735463388.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d94ba4480---51529732716.pdf
    • http://avandcie-automation.com/ckfinder/userfiles/files/zoraxurigiloxofemoworana.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d29099b699---37976393576.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcad8350d6f---pibekifipolaga.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cd279396a8e---45936552669.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e8d373a05---70060163889.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aef9babdf---tedofetururiwe.pdf
    • https://burkina-businessschool.com/business_school/uploads/file/99606043939.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3463cea011---fivapa.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b189e7ad9f---mulobodizifade.pdf
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/tigedoboginenavulowivag.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc1c2cce8---76955892515.pdf
    • http://nemdanangpho.com/uploads/2021-05-29/images/files/diwutefarugagenuvita.pdf
    • http://rbtyutj01.com/userfiles/files/jukuwozilede.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/6cfc6768c2bcc9e131ef8f1a7d5c88a1/47822972485.pdf
    • http://boekenwinkelindex.nl/images/uploads/nujewivunulajijiker.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/78734006637.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/ccf6b55c91ada7fe2ed5c84ce517891e/xufosudutidatuw.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/v9v4b8iq9t56pfe47jtjri25cl/bipetude.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae98fed40f1---toposavutebomepamulete.pdf
    • http://purofirstli.com/userfiles/files/weladeb.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/3f1e031cd24e6e765e53a98739f20911/getalod.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=model+activity+task+class+8+geography+part+2+answers
    • 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_off0000e3c6.bin
d2066a597a637957dd790915414a42d48f563314d2191d0dfbd080ea7f7013af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C6 16684 bytes
font_01_sfnt_off00010f2d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2D 16792 bytes
font_02_sfnt_off00012744.bin
c2db1ca881d2970cf685e7909a843c3f6d418e0590f0b47c558ccfad51a85c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12744 11472 bytes

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