Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2a86ef182be12f…

MALICIOUS

PDF

75.3 KB Created: 2021-05-08 06:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 84c6d3eea4aba411e565bbb3c33891cc SHA-1: 7ae774b6cb977dcd465388bb4ab29db0cc7efeed SHA-256: 2e2a86ef182be12f7f2aced178bed30740e4d91f920e806ccbcb122d4d0fad8a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a link farm, with many pointing to other PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the structure and numerous external URLs suggest an attempt to lure users to malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=un+monstruo+viene+a+verme+libro+sinopsis PDF link annotation
    • https://cdn.sqhk.co/fitamorigob/clajdAD/23144847223.pdfIn PDF document text
    • http://basvuruizleme.online/solo_vpn_apk_downloadipady.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481528/normal_5ffe7aa034504.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/gxihwFx/telegram_and_gazette_worcester_ma_court_records.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/ejiagdi/parler_couramment_meaning_in_english.pdfIn PDF document text
    • http://trelon.fun/neumonia_neonatal_20187ydzc.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/rhj3H0Y/43430405557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479933/normal_600cc91ef054a.pdfIn PDF document text
    • http://trikolor.site/7771823340j1o1y.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/togoxisetarelit_zegotirovabaru_raxeko_pagawodad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_6038050d21f82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365607/normal_60086b2656fba.pdfIn PDF document text
    • https://dowoxadi.weebly.com/uploads/1/3/1/3/131380004/bitedagojiwuzeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_60198f350545b.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/0ifcpoZ/dobufoju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/taguxif/would_be_fine_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/run_bts_ep_86_eng_sub.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/blackberry_curve_9360_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 5156 bytes
SHA-256: e35bd82ee63427cfd9cc8ed2d1655fb9840898166b772e918c285be4d5f7d978
font_01_sfnt_off0000f72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 12004 bytes
SHA-256: 7e4ed10c51feb58481bd8850ef9bfce9d3f65685af6336e8ce13b36c13583f99

Open this report in the interactive analyzer, or submit your own file for analysis.