Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4945d1349cf279…

MALICIOUS

PDF

74.9 KB Created: 2020-12-08 14:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bf3aacf136df6d856157a2fecad91dd0 SHA-1: 26edf297c4f86176c03f16cc40278d0cf1397bb3 SHA-256: 9f4945d1349cf2798b294efd082113948b6846a989dc730a58ccef26dc472ae2
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic and multiple external URIs, including one pointing to 'traffnew.ru', suggests the document is designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a phishing or malware distribution vector.

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://traffnew.ru/strik?utm_term=equus+gauges+review PDF link annotation
    • https://pareruli.weebly.com/uploads/1/3/4/8/134891857/3984465.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/xuwupemozaximip-rajobunu-nugeneluzota-jukirutaki.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/fevon-vadegudozudulap-nudufibodaf.pdfIn PDF document text
    • https://misaxokur.weebly.com/uploads/1/3/4/3/134354007/4140741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5fb518a448c34.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://uploads.strikinglycdn.com/files/2ced9c5e-24f1-44bf-900a-18220fe74012/cphq_exam_secrets_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd12507dd1bd0a7624d7cb/1606226514905/louisa_county_high_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59fe145a8629dca83b8c/1606375935893/show_chrome_accessories_for_motorcycles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d198656c-7d6c-4237-ae0b-8fbc8d1a5515/mathematical_analysis_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b20ec6-eee6-4311-b5d2-321e05fa2f94/73288584182.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/49712443965.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe025e3c6ccf69f3252bff/1606287970074/big_problems_with_the_articles_of_confederation_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f79e2e34347c7044618a/t/5fce8a92582dd45c7f35fa0b/1607371414499/38925250540.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_off0000e02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02C 4640 bytes
SHA-256: 3cb599aba6ee4f48d63d2cc0895ba94c4770938e0f4b81f69a16e49b934d5187
font_01_sfnt_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 9660 bytes
SHA-256: 8bf4d663aaa39c8b0f025636ff353e0bc39664d095dd4bcf4e6d0d5311b04e88
font_02_sfnt_off0001110c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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