Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d4e05b4f9b75ee…

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 23:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cb5fa13ff6fc76dafb5470dd70112afb SHA-1: 19b2e7793536751045b11cee267e2b192fe49bc1 SHA-256: c0d4e05b4f9b75ee6cd85bfb40e0dde47fb4aa694165da50e58cf93e187a45bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of multiple external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pistant.ru/uplcv?utm_term=single+phase+to+three+phase+connection PDF link annotation
    • https://otartufo.com/ckfinder/tartufofiles/files/suganogotogamufuzuvuzanal.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/29146937687.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/93082425756.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/15q8nft0hnpgof9giqlg81r1g0/39550666642.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/14074327143.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090bf9eb9d14---tisopujenabok.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/71845106502.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/4b2e63e3ac31ee84ce952f1186872b41/vodawurofe.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210831153323.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf17a346ff---17635508523.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/nariravibadajox.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/5767437545.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610359a65a4a6---lobovobinojuvalowufovisiv.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/jurirurukedewodufokib.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/cc238b9c5753f0b915fa5ae2d44c4d14/98152523795.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/632d70d0f40c417842688bfe444548fe/wajifewepupe.pdfIn PDF document text
    • https://digireg.se/upload/matekivi.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/gewifumavazipemirugadopa.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/53665951660.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/89776116785.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/30350f8741d41a82fc33decbf3a2f763/96930066682.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/votawiwujategi.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/7259139346.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/c8e0b49d7f0bd42fe972b240f3a2b5b3/moloninutesijukolow.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/f9c11df45323605e5b3c6c0e3c5e5d4f/migefuvapujiriwo.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 18120 bytes
SHA-256: 52008899610d8e5987fc2b49eee71885d9734545945a03f9d06dfa8c6a5bc57d
font_02_sfnt_off00012d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D69 10728 bytes
SHA-256: 6bb962f40d831ea01e05f381da064c26ae8b4dcf13aa1c88d4d8faf143afb2b8

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