Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0b4e7af122f60a…

MALICIOUS

PDF

77.6 KB Created: 2021-08-05 01:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 86fb35cc1a2b463fa03cf7ed65f2ab64 SHA-1: dc6af5736b39f66c6a07fad744e704ddb5590a87 SHA-256: 5c0b4e7af122f60a17e20151fac21f9682252d7a1e5002e4ab0e128a2e09cf6e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6242

Heuristics 5

  • 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
  • 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://medvor.ru/uplcv?utm_term=stores+ledger+account+pdf PDF link annotation
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/b2a51640817a5996b38bf49dbb9130d9/21196768358.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/79242055118.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c61f89a25fa---fuwutujeditej.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/9062185838.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/28447041771.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/35c0ac9d7471b001adbbf5de3fc063c4/1336209564.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202152139552885.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c67cef43595---dobudamozavekosivazosar.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606da0c19984e---82326965778.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/70559111505.pdfIn PDF document text
    • http://kaies.cn/upfiles/21062709284373816720xdx9.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/28839881897.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/punarerewilifenokeb.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/62607372709.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/24030669547.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/c6qia78mfgjkto357373bjgang/nevunumobuvabinuvofex.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cdac2fd0cd6---98061965087.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d054954c8e---57058905800.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/65129860257.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/pvtlrtevm85pf3eqm39hmbf1s5/82847139735.pdfIn PDF document text
    • http://ciskmv.com/css/file/puvapipetir.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/kukiruwororozodijowukufa.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 16416 bytes
SHA-256: 5ec2a8b50be157725ad7ce349a1bc12aa7a00d3c4b45fccc4a043cc24cbc0369
font_01_sfnt_off00011c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3D 10876 bytes
SHA-256: e2db52d1948337164e258f617657aa00f877bcf560ff0b507a80fb7495c5d0b0

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