Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5def42d44caceb…

MALICIOUS

PDF

58.6 KB Created: 2020-11-21 20:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d045b846c06b8f3a8d203a97240017f1 SHA-1: 71c86769dd4e8bac7b52f7794fd4419d9dc8619b SHA-256: 6b5def42d44cacebd7bf06d2ab1304a76eaa0ef823bef7abb6763df0d9024b8a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body is heavily obfuscated and appears to be a corrupted or malformed representation of a manual, serving as a lure.

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://traffset.ru/123?utm_term=seiki+se32hyt+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5f9fdb6077bd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f877e31ea3b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476294/normal_5fb2b2e48ad62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5f9edd2e7374c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5f8a9d1be0c09.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/63bdf600-a4a6-49a1-ab37-5b2b998bb4a3/29547983005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f619b9-5553-46ae-8722-37877db23207/botuzus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84757227-eef3-447b-b6d5-02ab6409a996/32676666077.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/bose_quietcomfort_3_headphones_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e6adcb-05f1-4525-9844-cd6d72085d7d/siponabajoti.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/nefod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e9ce54b-4f1b-408f-b9ff-e7862549b508/67539600841.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_off0000a885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA885 5392 bytes
SHA-256: e235df22e5bb5dc56609ce085b70577bc7eab21263f844b8e2c480702e2081ac
font_01_sfnt_off0000bac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC1 10368 bytes
SHA-256: db1e3cb389cde2ea9e55982a1cb1afaf834a1a9ba312c5332e4e88ecb232c1bc