Malicious PDF — malware analysis report

Static analysis result for SHA-256 d733ae43f577e9b6…

MALICIOUS

PDF

75.5 KB Created: 2021-01-26 11:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 78af11aee2932f608c328845c6b044ff SHA-1: 828d485124a413f6da697d4bd6f0b976454833ac SHA-256: d733ae43f577e9b678a3ba161d1c3552a1977eb068606b5ce70eeb77ed6d3242
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to 'service tax pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing attack.

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://bologen.ru/aws?utm_term=abatement+in+service+tax+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5fd0b4e51fb04.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/gchhTe1/62566372329.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/lghqrjg/civilization_4_beyond_the_sword_civilopedia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365575/normal_5fca0adf2cf3f.pdfIn PDF document text
    • http://lg-copyrightforms.com/pedometer_step_counter_onlinen06ip.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/iFjbhdP/64669529123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471235/normal_5fc79b23986a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496378/normal_5fcd589aaf1fa.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/jtCjche/gaxabesoranidiradugur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5fe1fac0e910e.pdfIn PDF document text
    • http://romeita.space/tornadoes_today_in_gaxfs79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447433/normal_5fd34fdcdb6e3.pdfIn PDF document text
    • http://theharaka.online/kelikuditoloekeve.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/Fhfjihb/neo_geo_pocket_game_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/xolilipedeko/jbhbigq/fujadepokagovivuna.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/a3cOlLb/35614759932.pdfIn PDF document text
    • http://topsale.pro/valiant_hearts_the_great_war_walkthrough_chapter_3h91jo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 5524 bytes
SHA-256: 9a94c526fd7925c479234f8c0d9973dc8ff1fbece25df03b53943f9ad4126f5b
font_01_sfnt_off0000fc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 10520 bytes
SHA-256: 72335eab982215762dc51559f7f3881b02f41afa0ac972f80caba19ece223133

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