Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef344244de7e3fd…

MALICIOUS

PDF

64.8 KB Created: 2020-11-22 23:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: db5ca3d33329a9603dd236018ae3adf5 SHA-1: b1d3a26bd04de91f24c80b46e994f3eb0a45f6a4 SHA-256: 0ef344244de7e3fd0dba594bf50d899ab2b3039c952743615801bbe3748f39a9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct scripting was found to indicate specific malicious actions beyond redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=bacterial+physiology+and+metabolism PDF link annotation
    • https://simidolipuxemit.weebly.com/uploads/1/3/4/4/134486986/a7ac3.pdfIn PDF document text
    • https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/tobibarososibul.pdfIn PDF document text
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/03619ec08.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/f9498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423700/normal_5f9f95d22a236.pdfIn PDF document text
    • https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/gavanig_kagojilosol.pdfIn PDF document text
    • https://wabegikabakupoz.weebly.com/uploads/1/3/4/6/134668284/eb13dff8.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/3588392.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/vilonumuzimudiwujo.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/7106662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414677/normal_5fb27a0ac4d3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90b26fc-a0ac-461f-857f-36a006119c56/slope_unblocked_games_9696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b933be9d-d676-4100-a2ad-e26b76f4a270/the_burnout_society.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d5bd71-8241-483b-bffc-54e011e3f9d2/wooden_battles_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c0a1c3-5419-4fe9-8d16-4dede54a3ff3/bleach_brave_souls_upcoming_gachas.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://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_off0000bd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD44 5780 bytes
SHA-256: 027c376bdb310d714591c0c09f56fef6ef7c371919e1d888839023efea9e3ab0
font_01_sfnt_off0000d0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C9 11588 bytes
SHA-256: 37a7a55abb0996c74fcbd019fada32af30352ba7d6e9ae146b64e6c0fe3b7d10

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