Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e28e53f30b708cf…

MALICIOUS

PDF

77.9 KB Created: 2021-02-12 19:36:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1eaf8f6c740cb192765409bbc08f85f7 SHA-1: 27ff4e1d781d2f8d0d4010699f2e17762ca70b7a SHA-256: 3e28e53f30b708cf2aa84fbacfbf524d0c352e6d3bc168a8756ba1683859145f
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing lure. The document body, though heavily obfuscated, suggests a theme related to IRS penalty abatement, aiming to trick users into downloading further malicious content. No scripts were extracted, but the presence of external URLs points to a download or redirection mechanism.

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://seumenha.ru/123?utm_term=irs+penalty+abatement+request+reasonable+cause PDF link annotation
    • https://cdn.sqhk.co/gonolesuzam/4PykFLs/bed_wars_map_hypixel_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/jicicii/magic_school_story.pdfIn PDF document text
    • https://cdn.sqhk.co/fotutubujuf/eifgfib/police_officer_salary_orlando_florida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410432/normal_5ff8541196728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366407/normal_5ff9eeedbf444.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/nEXsnjd/26858768038.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/ifldDLr/97418189103.pdfIn PDF document text
    • https://cdn.sqhk.co/salasereki/fVAhX9G/22192375410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_6003cd9184545.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/ThhOOLJ/speedy_cash_advance_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/7Ugd7Js/betikibibiridewexu.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/mJjHher/ivar_the_boneless_long_hair.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/hieXUIq/foundr_magazine_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/80gdojc/bell_bottom_pants_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/gdggggF/dalejodizevesesepewivobak.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/Yzp08Zu/one_god_scriptures_kjv.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/hwrr0gj/11608108084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tufuripisaren.epizy.com/laperinivolefewu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 5384 bytes
SHA-256: b6df15e268cf7f2c0a30bd7fffef554b24799975da71efefabae7ab69daf4bf7
font_01_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 10216 bytes
SHA-256: 4d967e69f9a4cd15539ce71a389cedb360b33c6adb2740a6fd49eac8a6089fcb

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