Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73df35f8c10f7b3…

MALICIOUS

PDF

67.1 KB Created: 2021-02-05 02:23:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d9a4f713e4d14ace0f97c0ff8cac8023 SHA-1: cd5a86846a806c0b59c926f92fd65d6d45a466d3 SHA-256: f73df35f8c10f7b31d1de84ed937965f94e6a8a453414a4a1b62655aac5df749
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'John Deere la105 mower parts diagram'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=john+deere+la105+mower+parts+diagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fdf335abc178.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427821/normal_6003702f87926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_5fd5f5edd15cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5fcbd1388b484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_601488215acc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_60150ddc82a2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fe2d9c9655a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384821/normal_5fe55657d1888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402711/normal_6006d1dd57023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405652/normal_600e3767b7eb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_60082334d7c0a.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/zupenafud/zubotagexip.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/ornamental_fish_breeding_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/electrons_in_atoms_practice_problems_answer_key.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E7 5772 bytes
SHA-256: 2a7461f81cef63e658c2a300cc28d51b2773a4ba9db533b3ea0252256a9f2a92
font_01_sfnt_off0000db6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 10572 bytes
SHA-256: 92d16e32e2b28e85e9e895805611aa128a5bfe530cafa107dacc022e71f46e27

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