Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e83cdbae9b5170…

MALICIOUS

PDF

67.9 KB Created: 2020-11-25 09:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cce95249df52cc3386e6d446fb72bd6e SHA-1: 1291438211f223173d957aecd0c67d2a56d9a204 SHA-256: a7e83cdbae9b5170143c695748043b49f9c59ba42282cd6989d4e11802cbc20a
154 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/aws?utm_term=laurens+county+sheriff+arrest+report'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/aws?utm_term=laurens+county+sheriff+arrest+report In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5fa58be1a5daa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481830/normal_5fb72f3b51ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f9e3c40a9245.pdfIn PDF document text
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/fagaz-sodaju-jamuwubibuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f908283760a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f892498914c3.pdfIn PDF document text
    • https://vagipirisixo.weebly.com/uploads/1/3/4/8/134861957/lezubid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5fb44163e64c3.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/9730950.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/b9e8d7fa-4f16-47f1-b6f8-d11c1bd40a62/2448177350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa13d360-4402-498b-819a-0ccf4c910c1b/gatategiwivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b76863-906e-4212-89c9-1e3327ce4696/tojilafudowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78762c76-f025-411c-b47f-5472ba975f59/balipupogizenevaz.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_off0000cc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC14 5116 bytes
SHA-256: c0b916b3f6871196b81f9be8b5941ca3a90d12e90a516eea385fa5bc35769746
font_01_sfnt_off0000dd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 10800 bytes
SHA-256: e6e0fcfbb4bbc90a61518ef128c554bb57a6aa686405a423ffbbc78e273af0e7

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