Malicious PDF — malware analysis report

Static analysis result for SHA-256 4012b6359f4f0b7f…

MALICIOUS

PDF

72.8 KB Created: 2020-11-11 22:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 618f9bb9e9b4f7249f380f4fb9b2f401 SHA-1: 7b7788220ef80b323c0f1bcb6ed0ad823eb45aa6 SHA-256: 4012b6359f4f0b7f9ce6e82619cba6ad1823929736b969b88c520959fa5a0c55
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, indicative of a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially malicious or deceptive websites.

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 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.
  • 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://trafftec.ru/123?utm_term=stained+glass+grinder+amazon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8a2d90cf5da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5fabe4849a944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5f98c0b405930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f98e92c612e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5f9ca23683d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5f980a62552c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5fabeacca079d.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/58df1478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5fa3a053ed4b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5f9c820e371b2.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/pibajuwi/nmms_model_question_papers_8th.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sovesivedapatusutelowasu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/jesus_bleibet_meine_freude_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/man_s_search_for_himself_rollo_may.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 5300 bytes
SHA-256: 3dbcf0989e0922056c3820badb29d1e9656f9374d19e4bf322f6ad893163ae82
font_01_sfnt_off0000f21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21D 10524 bytes
SHA-256: e3cba2732cd554b1cc92e40a5608fa247bb88c789560ddd0718ca15feedb1be3

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