Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1cf8300dddd590…

MALICIOUS

PDF

70.3 KB Created: 2021-05-09 12:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ca07b9a353380049016af13df9048869 SHA-1: cef1901cea7cd3e9c0d978a2f9264b15aaa7bf78 SHA-256: 7c1cf8300dddd59033eba1bcb454f7e08427d2007e93e39c459f65503702791b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a program guide, likely intended to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7771

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=channel+7+program+guide+qld PDF link annotation
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/jsjlc4vedah6jkk973germtkii/kotafowelunememed.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/17b3eb79ede6850058380ee7c5c021cf/davoniduto.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca906ad083---40210268775.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/277fe472ae0957f8af2a9553d96c918e/30025518029.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/b2d9ff4b9468efd20411fa91a912d83e/lisezigub.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/01b79e839b5336dc6f122c4bc89c7fbb/73549994467.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/961e9f28b0e3243d5260d0976a1518c0/latevujaxitiw.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080b35e45f93---11008221073.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1ec78915---23085271371.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160840d381bdba---43009322796.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/0b980cb3d7e2a6dc55fccb9a531cceca/tetidofegemopuf.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/1bb33ea77da727099783446982e57e97/50351061436.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd441f1814---xesofutosedosuraxaroxibo.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a54621199---82327744252.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608740f689cd4---33326392362.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0fc5748d7---dejopebadikixe.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609592919356d---70676663736.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10D 5228 bytes
SHA-256: 5fded288cfc1e4beb3d74fef7f0971c7654f5aa4964885f79d014b76381646d0
font_01_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 2024 bytes
SHA-256: a511fb262e2f240b0cc62b800179189f1c69c7b4d67d938f9bc0c5e12ef74554

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