Malicious PDF — malware analysis report

Static analysis result for SHA-256 585196e637f92ddf…

MALICIOUS

PDF

77.0 KB Created: 2021-02-22 11:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 02e2e2fd91ccc572f2e2e4cd52b30207 SHA-1: 5370fc222270121698f56edec889da796f0ec728 SHA-256: 585196e637f92ddf29eaaebc6f04690e9307344fe9fc78a1ee75fd974e9b4473
156 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 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://bologen.ru/123?utm_term=microsoft+dynamics+365+business+central+field+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fd07aab922c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498392/normal_6007953392e28.pdfIn PDF document text
    • https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/7339180e85bd26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453550/normal_5fe0290194bc7.pdfIn PDF document text
    • https://wewopamutufufo.weebly.com/uploads/1/3/1/3/131398135/musinazukewazibeda.pdfIn PDF document text
    • https://wonumajogo.weebly.com/uploads/1/3/1/3/131379434/fuviluta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_6008013ab49a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473903/normal_5ff40293395b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451940/normal_6000b33f2b43a.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/rimejiguvif/neurontin_davis_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/using_fuzzy_lookup_in_ssis.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/tapatapejilitiranunasa.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/cowbellpedia_2018_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/fort_worth_police_department_accident_report.pdfIn PDF document text
    • http://zomufebike.epizy.com/25817319923.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/72592489247.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/states_and_capitals_of_world_list.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_off0000eae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 6032 bytes
SHA-256: 80e8927002d0697134e50eb93b8eae06bc0e1ef77f6ca420f8c1a3a576305010
font_01_sfnt_off0000ff65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF65 11640 bytes
SHA-256: 1ef7256d6b648bbe680f5411b6e3c8a492b06bc5fc796f18bc352a716e71b3b7

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