Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9eb2a3148fe404…

MALICIOUS

PDF

58.1 KB Created: 2020-12-18 00:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bd546fb1a79ce795c77d837ae7dbfdf7 SHA-1: 16eccaf6a2a5a922bb2cbc927a14194e737281a2 SHA-256: 6a9eb2a3148fe4045f90cb23affc9b874c92147a5fcb8892e60c9f83583b01b7
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 URL pointing to 'trafftec.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to reference 'Ikea loft bed with desk stuva', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://trafftec.ru/123?utm_term=ikea+loft+bed+with+desk+stuva PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5f919142762c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_5fa43f3a750c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5f9b839d4367e.pdfIn PDF document text
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/f86c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_5fb41790e69c3.pdfIn PDF document text
    • https://kogezuzoxato.weebly.com/uploads/1/3/1/0/131070880/aa9e46cf4f4f.pdfIn PDF document text
    • https://zafapajesat.weebly.com/uploads/1/3/0/7/130740498/36fa3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5fd86bf035c5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5fd79bb1cf4fa.pdfIn PDF document text
    • https://xolisibi.weebly.com/uploads/1/3/4/4/134462635/pebefipane.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/5fbce344be7cfc36344e8aaf/t/5fbdf08cfa04221c71e5bbe0/1606283404701/nazixemogim.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/delta_airlines_boarding_pass.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f5b088c99b6d37a76c18/t/5fc1574e5147b14804657ab9/1606506318808/305461015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28637c89e1c4b8fc8d350/t/5fc5b9ac3570fb44d1c8fe1a/1606793645130/riramape.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_off0000ab72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB72 5192 bytes
SHA-256: 3e086f26375ef343512f3c7c21a9ca0b216f314d82d28593a0bad5e69603d93c
font_01_sfnt_off0000bd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3C 8928 bytes
SHA-256: 7020439c5951e847403e29202d6fe7dff7f64077dce92d92a09a2ea8997e4569

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