Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82de893fb6c8949…

MALICIOUS

PDF

59.2 KB Created: 2020-11-26 12:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 900c37d4d8093ccb560beb0a5e953667 SHA-1: 7bf8927cd0abe4fe6a9c122bf04ae4a9f623e0cd SHA-256: f82de893fb6c8949f62024ab705998069e160c3c30f76e2a4d8d3f2132b57a3c
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, trafftec.ru. This URL is likely used to deliver a malicious payload or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/123?utm_term=broyhill+bedroom+set
    • https://cdn-cms.f-static.net/uploads/4401515/normal_5fae526458f43.pdf
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/mosigalokuvu.pdf
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5fbeb7c84e843.pdf
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5f948a6290c2f.pdf
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f92a54b5e541.pdf
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f887653e4bd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fc2cab55-6085-4c6d-b622-2747191e1728/nekopara_0_patch.pdf
    • https://uploads.strikinglycdn.com/files/23b1550c-ef1c-48d5-8242-bd8eb9e4e2bf/33001638989.pdf
    • https://s3.amazonaws.com/julaxel/sagogugurirajupozimafozo.pdf
    • https://uploads.strikinglycdn.com/files/c1c764f9-ebb7-420e-849f-98655316b8a2/mafosodidalemamuwafogon.pdf
    • https://uploads.strikinglycdn.com/files/f0d53a29-c28e-431b-b8cb-20c3ebe35611/gavezorolexaxemegovizo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae5b.bin
b5f812aa22457f15edd827ddd1192b60a8b0e00bdcd906cd187135f9fb7829da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5B 5148 bytes
font_01_sfnt_off0000bfb0.bin
f727d6546776c421553bf09c692da27846c82252ccf047c3e9341e89bbe550f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB0 9552 bytes

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