Malicious PDF — malware analysis report

Static analysis result for SHA-256 46185b758609792c…

MALICIOUS

PDF

87.0 KB Created: 2021-06-23 05:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4c032be935286dfe27aea034b9008cbc SHA-1: 405bb799cd236249193851e318bbd80b4450e555 SHA-256: 46185b758609792ce2e72e08352276913f390008afd2611624320e7d2ffb1dff
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating an attempt to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL targets are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec99b79aa3---fuvuwanezagoxusogofijagi.pdf In PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba995d5fb5---norosexegerigimil.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/18831439021.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/fa70e608eaf99df118a262c6703f71c7/81092346545.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/vfv3m5eghrndifgdfsppa9be07/30818128985.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/petokelelenusugokinepozin.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/dafanumogenewevodirodugu.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/c4bcva5fdcb8dr3glm4r0knml1/donija.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/88168665298.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/dd570074c59497b131d987e95d267ef8/55352141669.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/sapuganomowoperulu.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/05c659c1f91c915b71f84598f1558283/tagifakufatun.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/lufupeman.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=which+guild+are+you+mtgPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 5288 bytes
SHA-256: dd0a287cd0e628f35da643cebbdfebead4fa1d45963a627cbe63e037e697525d
font_01_sfnt_off00011e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E60 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 11880 bytes
SHA-256: 808e20160ae4ccbbaff69ebf963b4f0668d665e67b3d3a17426410b1d8f12d6b

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