Malicious PDF — malware analysis report

Static analysis result for SHA-256 b463687fab169e8c…

MALICIOUS

PDF

80.4 KB Created: 2020-11-30 10:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 200b73652d117daeb09cf1a367f69153 SHA-1: 1754dbc28db925fc2fefc28513bb74874227ecd5 SHA-256: b463687fab169e8c7e586558b8725b4bebc5b8c60d2c82f4e13231abc38e76d9
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 identified as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to assessment answers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=chapter+9+chemical+reactions+assessment+answers
    • https://cdn-cms.f-static.net/uploads/4408991/normal_5fae4efd5f27e.pdf
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5f9719715fdd1.pdf
    • https://cdn-cms.f-static.net/uploads/4459325/normal_5fb2c9b0dfb1a.pdf
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f8748e939a25.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe09d83c02f22b9dd46b73/1606289880717/62719875185.pdf
    • https://static1.squarespace.com/static/5fc0cc948139af037644bbed/t/5fc24848f81c9a2a0cecb31d/1606568008778/lesezoribobegirapaxuxulat.pdf
    • https://uploads.strikinglycdn.com/files/c3354724-cec0-495c-909f-2eaaaf064817/tfc_recycling_guide.pdf
    • https://static1.squarespace.com/static/5fc0ea21c30a162e0c52977d/t/5fc15b65fa04221c71528387/1606507367210/pofimamekejunowi.pdf
    • https://uploads.strikinglycdn.com/files/c0065c20-7322-4a04-8bb7-67e1ee0e52c7/77236898900.pdf
    • https://uploads.strikinglycdn.com/files/04498b51-d8bb-4f5e-bff5-d6ad737f4574/nikon_b700_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/e46e0bc2-c51a-491f-8372-8b368a885702/things_to_do_in_champaign_il_during_covid.pdf
    • https://static1.squarespace.com/static/5fbfe895e5c7695ca99606f9/t/5fc21b684f9837572027b4f0/1606556520582/208cc_hp_equivalent.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4de6145a8629dca762cc/1606372839030/7686765418.pdf
    • https://uploads.strikinglycdn.com/files/991f423b-5628-403b-8246-03886284dbd2/vonapiwagufoti.pdf
    • https://s3.amazonaws.com/gedesisumi/93395792770.pdf
    • https://uploads.strikinglycdn.com/files/f2dabd20-9103-4250-ba13-c5b69cf75b97/zuwobipemivomulizojo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f090.bin
0da0b6c68198e2f37be0646f07921ebdee5de1aebd5bcffa89646467756efe17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF090 5232 bytes
font_01_sfnt_off0001023e.bin
9c3341174aa685a26d1b3c3c7f4728fc3eae4e5d0ec83a62a32b862d5958d836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 10612 bytes
font_02_sfnt_off000125e9.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125E9 4324 bytes

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