Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a53bb01b583edd…

MALICIOUS

PDF

72.7 KB Created: 2020-12-02 19:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3ccec484c08b281f4992d697229739ce SHA-1: 30968472d4d0dfc665a0f8658ecf11868cf9f5c7 SHA-256: e6a53bb01b583edd90be805b2f420c9137d11b2ae60881e06805484833d73e91
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 identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with one pointing to 'traffset.ru', suggesting a phishing or malware distribution campaign. The presence of a PDF link farm heuristic further supports this, indicating the document's primary purpose is to redirect users to other potentially malicious PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=kannada+film+feeling+video+songs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464870/normal_5fc429daa3cf1.pdfIn PDF document text
    • https://muwidewosavuli.weebly.com/uploads/1/3/4/4/134435377/fogojak.pdfIn PDF document text
    • https://voziguwotameba.weebly.com/uploads/1/3/4/3/134345279/ffc40040a9e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_5fb54d4dc6d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f9118a89c5dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vojapu/witugotudurepusamovoduvak.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/dibalalosevowifesepafu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0668ef3361272aed630d/1606223465516/fetedazobufebodumujeva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0cb1ef3361272aee3244/1606225075121/iglesia_catolica_en_perris_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/rewabibanidagusopegejab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11cf00a2757459be424fe/t/5fc3a63c2dd96f59185d9181/1606657596892/que_es_fuerza_en_educacion_fisica_para_nios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8718bc8713fe6fd5bd3/1606219889922/zebolenilabapinej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc138ad3f75b1664300d547/1606498477995/6048695458.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc1521c4e98326c02416db3/1606504994881/trenton_elementary_school_maine.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07D 4868 bytes
SHA-256: ca65a8e0886e2fce50bfbf60bced0c1fc3b132d3b2413f49925469660bc2e1c2
font_01_sfnt_off0000e0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FA 11604 bytes
SHA-256: d90d869e8f782b1c0dd58f3e8356e36c459f5ccd31445a60be50cdcdb638d43a
font_02_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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