Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3af1edd314d6caf…

MALICIOUS

PDF

133.7 KB Created: 2021-06-25 12:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9c26d096ecc70f4e13b9f1e9fb95376a SHA-1: 4d54d50de9db10f7532a765d64d4084619a0cf65 SHA-256: d3af1edd314d6caf3c40080cac36b997dd4f6528b46adf39e08e529507426aa7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://huntic.ru/uplcv?utm_term=business+object+tutorial+pdf PDF link annotation
    • https://tuvanthietke13-5.com/webroot/img/files/sepibufulonusufo.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7ae26bc02---67489701463.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/3l4t1fiucbkkl3g6o0ee7prd5p/70357629486.pdfIn PDF document text
    • http://nctpa.biz/clients/5/51/51e593b678cc4707ea5ff7b662bcbdb9/File/vakoz.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2f83941b3---xedibetodil.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9e36206b84f3d8e8177c813d562391fc/junofeza.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/fugudet.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021052221195873499.pdfIn PDF document text
    • http://ahchala.com/img/file/fodaxapodurubikefazes.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073543304053---toboxumaxibotodokexoxax.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/4bvj1te8dc03bhf8h7sae7e930/nuvapoberebofogepasoluwu.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/tikipatenizusanijenefaw.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/61223549619.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A407 19492 bytes
SHA-256: e1a012559c4b24d9f09cb99ee6d191961eebf3edb71af0b038a0055024573041
font_01_sfnt_off0001d6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6B5 11036 bytes
SHA-256: 05bf8802fb0ee7113f8843b40eb7c08a86245036b484298e697115ef3f770c83
font_02_sfnt_off0001f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F051 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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