Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcaf1df401863409…

MALICIOUS

PDF

85.2 KB Created: 2021-07-16 02:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6ad4ecf65e35d590bd0edb823939e3ea SHA-1: aab7e1dcf099ebd2f2d64af5d93cc9c98b790ac0 SHA-256: bcaf1df4018634097154d903134a226e3695fc937c8c59623052452b2c6ec77d
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. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links indicate it's likely part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/3f41adf641099e348455406628f64071/56246050198.pdf In PDF document text
    • http://vce34.ru/attachments/file/95137388805.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160befe3653ec3---80108608355.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/22300928046.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/luxogisupope.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/73803359838.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c8d1d4b7e---37482459206.pdfIn PDF document text
    • https://ksboutlet.com/file/files/kenepadetobabumulawipeg.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e47885ef3b---siboneleparanejapev.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b3f5eb62136ea692ad025d29e4435830/23927186652.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/3cd4aksvfk2pgss7ksatborkfq/50981202512.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/dotojapawupopunexipeve.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/6a29d5ac5db1c28bac41a5dfb70a4e9f/16350690630.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/zojoworibonodaxanuselilis.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/25336314792.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/79464070949.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/5539585066.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/2396231718.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090709c8ec4d---judefisefewekarofadav.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609269ae31b72---sizokezinapop.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b0a1b672f---77759935783.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd01375a7ce---kopatiwomezoxatevuxefovak.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aa3b8d6cb---denekolerozuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ssc+board+exam+2021+time+tablePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 17476 bytes
SHA-256: ca8a5fa85c4ab33404329108f68fca6cfe27daa1e877b761bef129de33be51a5
font_01_sfnt_off00011596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 11036 bytes
SHA-256: e44b8e7fd1897fccb00bd0105cf6e65d4d955cd4158945c94d42e4ada46b78ae
font_02_sfnt_off00012f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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