Malicious PDF — malware analysis report

Static analysis result for SHA-256 405d6a9ead5c8c2b…

MALICIOUS

PDF

78.8 KB Created: 2021-02-26 17:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 72b52b1bee0d5c9a38ab6b254d7bd83f SHA-1: 3d823f71acfc1ff4cd8b22dc084aa165aa017fa2 SHA-256: 405d6a9ead5c8c2ba526c3a82554f42507824ecfd2b3baa8152a8dda6ab94173
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to search queries, directing users to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://mezovuduw.ru/award?keyword=what+happens+when+99+year+lease+expires+india PDF link annotation
    • https://mebemawadaj.weebly.com/uploads/1/3/5/2/135295691/jalorevebanozum.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/bezugad_lixolefezisife_xiselozosega.pdfIn PDF document text
    • https://teregurejojexol.weebly.com/uploads/1/3/4/8/134879353/talawuk.pdfIn PDF document text
    • http://vidclips.design/zudibejebomitolawufukidlsccc.pdfIn PDF document text
    • http://damita.fun/92615060618g4pbz.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/gh8hdgg/pancake_the_game_unlockables.pdfIn PDF document text
    • http://pinerapidsrr.com/denon_avr-1912_no_surround_soundsj5ez.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/idicjaE/fear_the_walking_dead_zombie_origin.pdfIn PDF document text
    • https://cdn.sqhk.co/japedovak/hiewhcN/23704058797.pdfIn PDF document text
    • http://mklhhhh.space/lixirebepesutinabewpf57.pdfIn PDF document text
    • http://show-visitor.xyz/35643532837swn3d.pdfIn PDF document text
    • http://triple-doska4.club/secret_neighbor_apk_downloadj077o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 5156 bytes
SHA-256: 5ef99cbaa452fbd5ad095861d0a808b33751d146232f15b0c79277d7abd739e7
font_01_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 10380 bytes
SHA-256: d9bd081fb0a341574425e1fe91b2ac26bb4cd2653994a61be6cd59a001571d6d
font_02_sfnt_off00012040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12040 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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