Malicious PDF — malware analysis report

Static analysis result for SHA-256 45dc2611c41c88fb…

MALICIOUS

PDF

94.9 KB Created: 2020-11-19 12:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 42d29965b237191d6cbe914f0c2da499 SHA-1: 1697faba504f7bb8a3fcbad49b8224460e120ed7 SHA-256: 45dc2611c41c88fb6f3b31b9b44080b8cec0ec69956384509c981c0da6634cc6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://traffset.ru/strik?utm_term=fabriquer+un+broyeur+a+pomme', is flagged as unknown reputation, suggesting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=fabriquer+un+broyeur+a+pomme PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f8f3f4f6d714.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/rimisanejazu_nopuk_gonatikanasef.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/keneres.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0365e133-4fc8-4db4-8e57-c7d3d0fdcb98/xixuvasusotebufujuzefonul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ea84b3-5dcf-4e1b-a61c-b06c994590fa/dufikenusogiwofupenited.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6254422e-45d1-4a58-a83a-c140f76b2313/ibm_cognos_crosstab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b523e0d9-04e7-4a23-bb60-caefbea21573/better_homes_and_gardens_colebrook_sofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843cc647-d6e2-4f0d-b9d4-34c9ae25365a/pmt_252_module_1_exam_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a291e5-2c4f-4bca-b42d-48378c43e685/59182460546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff2c4d4-f058-40c9-ab21-582edf1dc9f1/ketow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833c86f3-2d2b-432f-a1b2-8397f0b41b07/95454383226.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_off000136a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A0 5076 bytes
SHA-256: d8a5a8f4835aea7c111307e2eeea0117ee7a53cf556c681db3270d3647f5319d
font_01_sfnt_off000147dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DD 12024 bytes
SHA-256: f77ada5fd39bca7b2674d3f9bf0294915cf398ae8ba58cfd6ade9ee4c362ff7d

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