Malicious PDF — malware analysis report

Static analysis result for SHA-256 6452be16d4b35690…

MALICIOUS

PDF

94.8 KB Created: 2020-11-13 14:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d1c281f6886bcf3a9b27164c7f3b1a02 SHA-1: b040273d1dda0d3ecff2224f4a2e3cc44de13444 SHA-256: 6452be16d4b356907474687665f1663c4e4d2edd1e66a797395327a555e485dc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=county+sports+zone+bracket PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f9bce1d010f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f8a3ff0c15c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f922d4f0c0e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/842b99c8-fe35-46e2-8549-85a0301307ac/nuvawipeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c3c28a-21d7-4eac-8b66-16050c10b667/7096742920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d7e140-a27b-40ea-aa5e-28d2e34b165a/mobile_home_air_conditioner_blower_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272c88df-ca2c-4257-b41b-3eebdd90c5f0/biwadunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f5fec1-f839-49ff-8222-50b1de01e9a4/81132930369.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/mezidotete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b4e6da-2b68-49ee-9959-49eac09d57df/lake_controller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb57dd32-6d2e-4fcb-a424-ef8eced69833/85225671472.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC6 5108 bytes
SHA-256: f74e45f03c0638f437dd041f5defaeb0b53d9a6585e321e6542adf3c8e0ea45d
font_01_sfnt_off00013142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13142 15396 bytes
SHA-256: 6f07e931663479b76dd1627d06d49c73bb51ad6725120d8c81abc97022f7de5d
font_02_sfnt_off000160ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160BA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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