Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1a70a50a091ceb…

MALICIOUS

PDF

77.3 KB Created: 2021-02-28 08:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 429a2b3c91aef69fb87cb1ee3c4c3274 SHA-1: 87b57accc90a321d96b0535ebb2c08d94145a25a SHA-256: 3a1a70a50a091cebdabdf380f782e123ea50380127dde6f4e9f9d85b2ffe67eb
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to game save editors, which is a common tactic for phishing or malware distribution. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=diablo+3+reaper+of+souls+save+editor+ps3 PDF link annotation
    • https://cdn.sqhk.co/feduvefas/igJjiJc/rejil.pdfIn PDF document text
    • https://dulupuwo.weebly.com/uploads/1/3/5/3/135393712/vabijonilek.pdfIn PDF document text
    • http://goldstein.berlin/puzzle_and_dragons_z_orb_code7oqxl.pdfIn PDF document text
    • http://barashik.space/dell_latitude_e6430_keyboard_guideykbyo.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/e7hghhd/spider_bites_piercing_tongue.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/deziselexo.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/advancing_vocabulary_skills_short_version29nnu.pdfIn PDF document text
    • https://jevebuna.weebly.com/uploads/1/3/4/5/134594548/fosibak.pdfIn PDF document text
    • https://gumosoxegobekij.weebly.com/uploads/1/3/3/9/133999275/9479085.pdfIn PDF document text
    • http://didazema.mypressonline.com/pared.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_600051c2d1cdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381541/normal_5fec7197354bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_601ae3e6366db.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 5400 bytes
SHA-256: d4782a0b8ae8f6d138fe5047fb5b5c7334bb4c4db7770891c2cea1cbaf70a68f
font_01_sfnt_off00010254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10254 11112 bytes
SHA-256: 7c6086d045d78a05ad78abe1376adf09bda3e058a0d21e56d4c964575bd91411

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