Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f929be42c8c4b8…

MALICIOUS

PDF

76.8 KB Created: 2020-11-18 13:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aa7851fef2873701fd463ca1c255fe8 SHA-1: c3a92dfb7b0e6156c07895a5e91beba44f4ba8d4 SHA-256: 28f929be42c8c4b89433d7e99b23da500f5ecb77ab9a8eb5b252e17bdc1f179c
202 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and uses advance-fee scam lures, suggesting it's designed to trick users into clicking malicious links. The embedded URL `https://traffmen.ru/aws?utm_term=myob+accountedge+v17` is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Myob accountedge v17', potentially part of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=myob+accountedge+v17
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f8cb8fe66418.pdf
    • https://cdn-cms.f-static.net/uploads/4472200/normal_5fb36677e12a5.pdf
    • https://cdn-cms.f-static.net/uploads/4411922/normal_5f93ba609102c.pdf
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5fa15a9578328.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/64bad122-bf55-4e9f-98a2-3530b2ea22df/200_forest_ave_medford_nj.pdf
    • https://s3.amazonaws.com/sowewazulejewi/check_cashing_open_sunday.pdf
    • https://uploads.strikinglycdn.com/files/fd50a1b3-714a-4974-a1ec-358cb982143f/conan_exiles_havoc_and_malice.pdf
    • https://uploads.strikinglycdn.com/files/36bea60f-c501-40d0-b2b5-2e309da63972/bosewoditupaditigewo.pdf
    • https://uploads.strikinglycdn.com/files/1a9cd66c-14e3-4e24-9738-d44807e4d026/62537858416.pdf
    • https://uploads.strikinglycdn.com/files/9099bf6b-c69b-4a2d-bbda-c9d0c4e37489/digital_insanity_keygen_password.pdf
    • https://uploads.strikinglycdn.com/files/6f010354-d515-41f9-93ee-92f05f4ccd0f/1393846750.pdf
    • https://uploads.strikinglycdn.com/files/46a79e9b-1860-4b27-bd2b-40ce90dc2b2a/gadebipimogojiwidemutu.pdf
    • https://uploads.strikinglycdn.com/files/1fc07c66-318c-4e8f-a108-d8078351da24/22198444416.pdf
    • https://uploads.strikinglycdn.com/files/07815e7a-7cbe-4699-9f4e-dbe17c806c04/puzegolipamekeralikuxom.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_off0000eede.bin
d8673870d4cc8fa99b8566395aafebd518cf4826b5ae258d1d5ca130fea9bb98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 5240 bytes
font_01_sfnt_off000100eb.bin
02e1ef8913b2f1e9170d4a421afddd0a6f7375c16e958c17db5afd0140dc0ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100EB 11076 bytes

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