Malicious PDF — malware analysis report

Static analysis result for SHA-256 384b07b852887e02…

MALICIOUS

PDF

69.6 KB Created: 2020-12-16 03:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 280568e647c080eab5fa83eb0acf5d5d SHA-1: 60625da5be52a995b2119252686332dabf8841e5 SHA-256: 384b07b852887e02e2cd17b7363627ba912d4c0039c5e820089061f9b7e17e9e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely for SEO manipulation or to distribute further malicious content. The primary malicious URL identified is trafffe.ru.

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://trafffe.ru/aws?utm_term=alexa+app+android+hands+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f922ada0445d.pdfIn PDF document text
    • https://junalupi.weebly.com/uploads/1/3/4/4/134460459/cf8e66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5fa08f315fef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_5faf702ae8c8d.pdfIn PDF document text
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/47cb8.pdfIn PDF document text
    • https://lepasedesefin.weebly.com/uploads/1/3/4/6/134625589/zuputiforu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5c07f92c50b1a1e98aee2/t/5fcdd94f978da30c561f79b3/1607326032344/vudaneralazizagakurilon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0a5af81c9a2a0c6966c8/1606290011266/xerazibekadekurixusoro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5ac94e98326c0207def3/1606376140054/polaris_sportsman_repair_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115bd5e8e827d428ee316/t/5fc21d45fa04221c716792c4/1606556997695/wilderness_systems_pungo_120_kayak_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e800a879396864085b93/t/5fc1204718e72e5fdbff8766/1606492233025/79787559366.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc042db8787e8798968ae67/t/5fcd12835d2e6f3bda422c8f/1607275139920/pictoword_level_482.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e10827a199023aceea85/t/5fc5b78a645712565401fb1b/1606793100554/fepafewizebalim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1210ec89e1c4b8fbfc3b6/t/5fc6913218e72e5fdbbd4ad9/1606848825455/78311507617.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5888ba13a450bab13d611/t/5fcfed65ad97cf6d8732a69c/1607462245931/xepevarobojedokogubusini.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_off0000d3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EF 5184 bytes
SHA-256: 879d11c35aa4ad8a9213976e0c989a211105ad3972938285acf2a87abac95e05
font_01_sfnt_off0000e58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58F 10500 bytes
SHA-256: f38b27a135daf08015daecf00982bffa10b2a1d8c9342380724ff1d06074a7fa

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