Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a9d37344a0669a…

MALICIOUS

PDF

72.9 KB Created: 2021-02-16 01:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 380c64b392a389c42decc60b2d000485 SHA-1: 2b5495086c72d3bf54aa8e1eb10220c2dbfea1a6 SHA-256: d0a9d37344a0669a8896b04069a3aa3ab6bc35cda53e22ac62169d6eac1d6b0e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely the primary lure. The document body, though heavily corrupted, suggests a pretext of providing an answer key to encourage clicks on the malicious link.

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://maypoin.ru/wix?keyword=right+triangle+trigonometry+solving+word+problems+worksheet+answer+key
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/166885.pdf
    • https://bavoramexur.weebly.com/uploads/1/3/5/3/135326869/sixudemigerif-gaseluzi.pdf
    • http://paksorond.xyz/80109739306unhjb.pdf
    • http://wildboost.club/lafuxefiv4oak6.pdf
    • http://reassurez-moi-fr.info/29885486212p42kh.pdf
    • http://alexsaf.ru/porter_cable_pocket_hole_jig_menardspkhkc.pdf
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/bexujitupusitixe.pdf
    • http://cocobuka3.xyz/42803257603rcmk8.pdf
    • https://cdn.sqhk.co/tefozakozup/gjhbljj/cosmic_showdown_mod_apk_download.pdf
    • https://fobepuwup.weebly.com/uploads/1/3/1/0/131070598/jufisujonirase.pdf
    • https://cdn.sqhk.co/pomorezolo/PY5Yha5/81039270743.pdf
    • https://faraxebeg.weebly.com/uploads/1/3/4/4/134475962/8500810.pdf
    • http://stat-index-co.com/resident_evil_4_gba4qeqe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xozelabudizi.epizy.com/fallout_4_companion_weapons_guide.pdf
    • http://ralupuwegilad.rf.gd/acceptance_test_report_meaning.pdf
    • http://jerovewoxisabu.epizy.com/instruction_manual_for_cen-_tech_digital_multimeter.pdf
    • http://bebalujoworaz.epizy.com/jopezeniti.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_off0000d51e.bin
14ae0bf27bdf8cb5156686efe25faf25ab9850e5c38311cf5671db27a0c773c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD51E 5840 bytes
font_01_sfnt_off0000e8ea.bin
a4b172e9f7e9e7b13332b5a029c2706075fef3af65af7acbec6cf0ce37b5bf20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 14380 bytes

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