Malicious PDF — malware analysis report

Static analysis result for SHA-256 db25242a119112c4…

MALICIOUS

PDF

68.0 KB Created: 2020-11-22 04:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fc1f42d010859afe9f8338216ff9d845 SHA-1: 4b7e16e1a4d427c119b0856b72d8e173a8b4767c SHA-256: db25242a119112c465c6f8ad2c559eb9bc068e07f9c961ff0b4871f903adc776
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=architectural+lettering+assignment'. The presence of a 'Visual download / call-to-action button lure' heuristic further supports the phishing or malicious download attempt. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or malware download.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/123?utm_term=architectural+lettering+assignment In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5fa963502369f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f89c19b08128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_5fb8d9a32e56b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446161/normal_5fa53f05da04c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384160/normal_5fb9712751288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403937/normal_5fa4900350c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f90148aeabf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_5fb0037eab5cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_5f8f4de13b569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5fa210208621d.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/585b7d32-e7c5-44e9-8ec2-6c526476ed0c/83210236193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389ef57c-527c-4b3b-9605-e8e82318a519/iron_hydroxide_molar_mass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609de659-8ccc-46fc-95c9-e7a0ee2a3f7a/74188313077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f41a6aef-30c5-4b63-a358-6eeadf9f21e7/nabomemavikatuku.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_off0000cd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD85 5204 bytes
SHA-256: d37543dc11b6ac4885964b83d06d355005360ec0d256e1eae55245e02d75a2da
font_01_sfnt_off0000df0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0E 10528 bytes
SHA-256: c66c5aa39c8fd0ae9e6e690f9bbc885658202cf0d9cd3d57b4d21c4964a87f48

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