Malicious PDF — malware analysis report

Static analysis result for SHA-256 7829b25fa2058376…

MALICIOUS

PDF

66.4 KB Created: 2020-11-18 12:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3066facfdad372bc8d77215e4541e5a3 SHA-1: d2c9bca09cddb7771d9447878afc98d449973bb0 SHA-256: 7829b25fa20583765ce7f51c445b4ef8c20dcbe72244e5b42963b9763b775e9e
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, indicating a phishing attempt. The document body, though partially corrupted, suggests a lure related to a 'crossword puzzle generator'. The embedded URL points to a suspicious domain, likely serving the malicious payload or phishing content.

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://trafffi.ru/aws?utm_term=crossword+puzzle+generator+with+answer+key
    • https://cdn-cms.f-static.net/uploads/4445869/normal_5fa75bab58193.pdf
    • https://cdn-cms.f-static.net/uploads/4404987/normal_5fa2952a5a92e.pdf
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5fa910c27a62e.pdf
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5f938e4f10c8b.pdf
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f8b33af065a3.pdf
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5fa58f71b7054.pdf
    • https://cdn-cms.f-static.net/uploads/4424027/normal_5fb29fd12b210.pdf
    • https://cdn-cms.f-static.net/uploads/4410703/normal_5f9882f19b15a.pdf
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5fad2b8229e5c.pdf
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f8a2bb6b377f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gewisetug/76014161531.pdf
    • https://s3.amazonaws.com/mijedusovineti/autonics_tz4st_temperature_controller.pdf
    • https://uploads.strikinglycdn.com/files/ec4f37aa-7c03-4385-8fb1-613ebc606f84/mindi_wood_janka.pdf
    • https://uploads.strikinglycdn.com/files/52a73911-6e83-4ae3-8e15-79c3aa4b1fe6/68137503296.pdf
    • https://s3.amazonaws.com/rexogeguxosix/vezasavutor.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_off0000c6fd.bin
37ef0b36aed836ecf461fe23715d9418f50a491292e3f2dde9bf3b91bccf2044		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FD 5432 bytes
font_01_sfnt_off0000d98b.bin
0a99517956bc305e191c5d2cbb73f1f43badfe773ef914842481ddb63a0ece51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD98B 10184 bytes

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