Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a7a981adfb2e77…

MALICIOUS

PDF

73.5 KB Created: 2020-12-06 09:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 571c72cf44038c954a970bf12a48e527 SHA-1: 1ee0c9a117378f26f98913e1cf4496c38c8f1131 SHA-256: d2a7a981adfb2e77a817722a0123a70e4d18811c73622b0526b047f771b6649d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, flagging it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Financial mathematics pdf grade 9', likely intended to trick users into visiting the malicious URL.

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/123?utm_term=financial+mathematics+pdf+grade+9
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/e87763e22f55a.pdf
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5fa4070712419.pdf
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/2011de2.pdf
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/sosufevomananojaxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zedilegol/atmospheric_science_an_introductory_survey_solutions_manual.pdf
    • https://s3.amazonaws.com/bulolimepol/emulateur_android_leger_pc.pdf
    • https://s3.amazonaws.com/jufowokedunod/william_wilson_edgar_allan_poe_english.pdf
    • https://s3.amazonaws.com/xisakazelelinim/45860978158.pdf
    • https://s3.amazonaws.com/varolexexus/sepia_tone_photoshop.pdf
    • https://s3.amazonaws.com/vaxebisapesi/timatuzosoreniwuvafuder.pdf
    • https://s3.amazonaws.com/risisipajole/antebellum_public_education_reform.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_off0000e17c.bin
7c3d362f4dba788ea96aabbe877d8530be5be6dd420bd702a1ada3fca9ccb023		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 5680 bytes
font_01_sfnt_off0000f4a5.bin
3f2fb6c8465085a4b6e847d9e844ffd485be5aa76d684c77f57efeb1615e572e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A5 10952 bytes

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