Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbac1e10bf0cf45…

MALICIOUS

PDF

98.1 KB Created: 2021-01-27 01:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 00bb7b2678266a6396398fa4745ae9f2 SHA-1: 94cca5a7ba3ea1fa669f889bcf94ff60159a01ad SHA-256: bbbac1e10bf0cf4535dc5c6d92bb7eb1e76d9510080db582e1ced9580fff3e86
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam campaign designed to redirect users to malicious sites.

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://seumenha.ru/123?utm_term=persona+5+royal+hold+up+answers PDF link annotation
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/4534567.pdfIn PDF document text
    • http://ibkreactiva2020.com/pc_games_download_free_listnrvh4.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/mBhhwhe/roku_stick_replacement_remote_amazon.pdfIn PDF document text
    • http://llloooodddd.space/dujudiqqc7.pdfIn PDF document text
    • https://pogipusuzifu.weebly.com/uploads/1/3/4/8/134869227/kizijoberuk_didimipaxivamab_rujaw_xazapewufoleluf.pdfIn PDF document text
    • http://modernstyle.pro/debekif31k2r.pdfIn PDF document text
    • https://cdn.sqhk.co/takulowizi/geZ6RHe/76393238225.pdfIn PDF document text
    • http://leopards.space/tikazuweliwazet1jjit.pdfIn PDF document text
    • http://bio-ita.fun/free_slots_play_storelhk0r.pdfIn PDF document text
    • https://julalawigito.weebly.com/uploads/1/3/4/8/134869680/katusovovo.pdfIn PDF document text
    • http://reduslimitaly.website/846181575916s7do.pdfIn PDF document text
    • https://tenosufude.weebly.com/uploads/1/3/1/4/131455069/40f12e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407804/normal_5fedc65eede4a.pdfIn PDF document text
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/4864130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481278/normal_600479747bc4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5ff94733bd116.pdfIn PDF document text
    • http://whitetwo.space/merchant_services_loginwgkhc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadinox.epizy.com/gokaxorebadudizop.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_off0001450b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1450B 5368 bytes
SHA-256: cd4ecf529d904241b56f644ec15deebd74be343e8c886d7e51abdfecd4cae41a
font_01_sfnt_off00015758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15758 10516 bytes
SHA-256: 6af239ceb93ed3fb6c86135233273d85c587999e87b0957d007bcdb211f42c32

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