Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb756e290ca44b9…

MALICIOUS

PDF

76.5 KB Created: 2021-04-28 18:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71c5e5d9b0864bc0000b3a83820fcd2d SHA-1: 0e416ed6d5dc6eb5897abf2ec503afd42179dc79 SHA-256: aeb756e290ca44b9dceb4ad82cad21c2c40b415cfbe60597c49e44488ebc4d7d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=craftsman+60v+chainsaw+reviews PDF link annotation
    • https://tetomorefaboma.weebly.com/uploads/1/3/1/3/131384600/peluxunutuwozikuxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468534/normal_6006664d34c0c.pdfIn PDF document text
    • https://cdn.sqhk.co/xewebevij/jhicwjb/penalty_kick_soccer_cool_math_games.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/tigifalewazire.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/jjHhfSn/mukti_camp_mod_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/cijz3hd/all_clover_dating_app_ads.pdfIn PDF document text
    • http://instapresent.site/serizajonelimokaw97ao.pdfIn PDF document text
    • https://cdn.sqhk.co/lolatonuvesa/xjjWjbG/tonavunezifurulipo.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuduwedimu/djahchf/babylon_bee_headline_submission.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/Tvhdjce/26299081187.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/hCjd6GK/promised_lands_susan_sontag.pdfIn PDF document text
    • https://dolujutizividev.weebly.com/uploads/1/3/4/8/134864897/fikabasunukewafuj.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/dgdxngc/gadotiganokeletelosameli.pdfIn PDF document text
    • https://rewusimivizegan.weebly.com/uploads/1/3/4/5/134578415/movur.pdfIn PDF document text
    • https://cdn.sqhk.co/dazanukisafa/1Hijfm1/74077425456.pdfIn PDF document text
    • https://dojenamolusojow.weebly.com/uploads/1/3/4/8/134868247/ketodezisagob.pdfIn PDF document text
    • http://polfact.site/korapehwwir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_60154c3b79687.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/jgi1gvJ/sabawuporozer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_60655e90a7f71.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/28369cef-953b-4af1-9c99-8ca05141fdb5/59352784525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26127b13-1320-47ce-b45c-f1c8a87339c6/marantz_portable_cassette_recorder_pmd_221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c89a5e2-d170-43d5-822a-d4f37b5865f1/loxifudivavativuwuna.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_off0000ecf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF7 5444 bytes
SHA-256: eedbc7ffb24f80e89b11933cbe1a69fd909d916130cbe4f59ded602295d5bb2f
font_01_sfnt_off0000ff61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF61 10244 bytes
SHA-256: 9aadc613a54bee6142c970ed612f1d229906cb05824bb948e685728ee9432210