Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9465afb930d2697…

MALICIOUS

PDF

69.8 KB Created: 2020-12-22 06:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7f028d502b8879b2c90c1dd6c1f26a6c SHA-1: 909f159cdd910fcfb1a471f85ff6c392af7493fd SHA-256: d9465afb930d26978a532a7eea408d9b52acd82eb0ffd639135a4b835f092a26
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=assassination+corp+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479240/normal_5fc37d30510a6.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/ce969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486193/normal_5fd152d9ad44e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_5faf7cfc2138b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f9ccc8d574fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467576/normal_5fd7baf8b2005.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/vezoza.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/6075611.pdfIn PDF document text
    • https://sogutujugaj.weebly.com/uploads/1/3/4/4/134403955/789937.pdfIn PDF document text
    • https://xapotaligefako.weebly.com/uploads/1/3/4/6/134612972/suxegoxasagus.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/boziwanatulezun_sevojalo_diwefufagemev.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/zugutixe/mepuvugigesawusatiweti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c894e98326c0206e19c/1606372490273/carta_poder_word_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/43359723926.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/ratej.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/nabojonubiwiditasuji.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_off0000d391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD391 5240 bytes
SHA-256: 24c78bac53dcbe644fc154d5afce9d499a98cfaeb9b55e58fa28fcf4502f6c9a
font_01_sfnt_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10796 bytes
SHA-256: ff81651bc4c6633e3b9f8e12fcfbc8f79b182b8b471a20061c0cf51d18f79549

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