Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a7d3c397a5c1c1…

MALICIOUS

PDF

72.8 KB Created: 2021-02-21 03:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2875e9cfcecde55b720dd4c77b30e99 SHA-1: 4d3ea3005275807987ebe81ae143aa692e163689 SHA-256: 50a7d3c397a5c1c18552ba2df509369916504fedf167c1decfae500570ae312c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers 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 malicious site. The document body, though heavily obfuscated, suggests a lure related to 'Mega man 5 boss order'. No scripts were extracted, but the presence of external URIs indicates an attempt to lead the user to a compromised resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=mega+man+5+boss+order
    • http://fallofelin.online/kominsky_method_season_2_episode_guide4r35k.pdf
    • http://dajinanumiki.iblogger.org/71019549361.pdf
    • http://bubble1.space/lonely_planet_ebook_usa_road_tripsqoq3r.pdf
    • https://static.s123-cdn-static.com/uploads/4454161/normal_5fe1f12991259.pdf
    • https://cdn-cms.f-static.net/uploads/4491148/normal_5fdb1b16baddb.pdf
    • http://gopumapi.iblogger.org/bhangra_training_video.pdf
    • http://tofabukusakuni.22web.org/78026848246.pdf
    • http://vebilodugisugod.iblogger.org/curriculum_vitae_formato_word_para_rellenar.pdf
    • https://static.s123-cdn-static.com/uploads/4461511/normal_6000cf8d62355.pdf
    • http://komarovskii.xyz/quantitative_trading_systems_2nd_editionqj18q.pdf
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fd7d96d20374.pdf
    • http://nukowivoxom.iblogger.org/47176919358.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jazupizewatabal.epizy.com/rugexonebulejeguriduta.pdf
    • http://mufogedone.epizy.com/alternatives_to_google_forms_free.pdf
    • http://xasidesarilune.epizy.com/38322310463.pdf
    • http://xokowire.epizy.com/honda_6500_sx_generator_manual.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_off0000e0c0.bin
846176a237ced2bf7dbab137d0e539a23e60fa3b3b619adb421f872cb58f1cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 5384 bytes
font_01_sfnt_off0000f304.bin
216c9677195520f034b78d97f541f9311ea28a35a2dfc0de2ad3798927bee816		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 10236 bytes

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