Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c6e79cf11b22b1…

MALICIOUS

PDF

1009.1 KB Created: 2021-06-10 09:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e19faf8f17bb41b586f0147352a2fa0b SHA-1: 83a43b4f67f64f6f13ea2b97c4888c2cc9d3bc72 SHA-256: f8c6e79cf11b22b1bba6e67b9ca33cc62f91044da51009262f75435ca57e2135
166 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick the user into downloading a password-protected file, likely containing a secondary payload. Multiple URLs pointing to compromised CMS upload storage were extracted, indicating a distribution infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=beyonce+halo+instrumental+mp3 PDF link annotation
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/4c477d9ac1fe6ed29782f400f0c623fc/rusofiwaseposasikudokufa.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609a877839e3b---gabutejubo.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/37315590688.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160846da7b0441---zogavet.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075da60ca752---12822821501.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/ec5e6a6a1a2afbd8401043dfd9cd0a02/39204988909.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/0qbc1cepri68mkupptpn0gp4j6/dupan.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/xudiguz.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/694fbcd2f84fd29ec4dda7683a021646/56131349885.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/ntnfj0mkcj26dn6h7ed915ngb9/4034872104.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/kedapadi.pdfIn PDF document text
    • http://splogservice.ru/content/file/6653582664.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a611e4ce0af---70759454408.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/mikoxugozogesawinozeta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://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_off000f6ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB2 5488 bytes
SHA-256: 99c8ac38e0ec54233a356ff2690ee23e87b4320acbfff9780005b528e3a6cec8
font_01_sfnt_off000f7d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3E 18020 bytes
SHA-256: e5bbf5f33e0202b0226a153bb1554a6b5c95ee8c9e996f5e5beba3401aeb97a0

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