Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcabaff2a19322c9…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 09:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e865d3695d8024e350cdcb54a51279b5 SHA-1: e6311948a14d15ae85935f1d969e0e69878e299d SHA-256: fcabaff2a19322c9dbbf71886acd6bae5865b28205d3b910e768c83a78cfddb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm hosted on compromised WordPress sites, likely intended to direct users to download malware, as suggested by the 'utm_term=snaptube+free+download' parameter in one of the URLs. The presence of numerous links to potentially compromised CMS upload directories reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735fa0b117d---96678659079.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607211cebc18e---gapabowe.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd057f359---6414291258.pdf
    • http://mitcostruttori.it/userfiles/files/mabogef.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b964147a5e---mixewi.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609832e21e850---70435390432.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c08f4213fc---25580620032.pdf
    • https://alshamiltrading.com/alshamilfiles/file/vudagejejub.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/s619hg9apnpsfsgb71gftvcdm4/gagologerukobaje.pdf
    • http://tulga.ru/editor/files/poxiduwa.pdf
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd68110473---miwowit.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/he0bt3mo0j3gdfd6751ps5nt6o/6553934067.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914e1fa1b9e---98811153609.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14c7116f0e---gaxebexavumubu.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160941f89ab3d3---liremotuwepopi.pdf
    • http://sahrugs.com/userfiles/file/mafeganuko.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/69191fbec62e86275e07838ca389685f/puzajugimowax.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ef6240f3b3ef07469a89a9499be526a6/walepivaruv.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077aa1177252---75037273440.pdf
    • https://ludifrance.fr/userfiles/file/17645930139.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/7njrf3ug3dp8ub6qpq4ltl5f6t/kizovodem.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=snaptube+free+download
    • 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_off0000eafa.bin
a5722a211aaf71c66e268ab1a3c80488851bd7cc5423f1879c39b3de94b22031
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 17048 bytes
font_01_sfnt_off000116d1.bin
460456df245f44a8ed06c8299fcc7744ecfdd9f7974dbe36c45d98362ff723f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 10632 bytes
font_02_sfnt_off00012f29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F29 16792 bytes