Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77fb52a0a1b7115…

MALICIOUS

PDF

74.9 KB Created: 2021-03-02 17:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 10c8708ccf9324406a2230c3a95e5681 SHA-1: cc3ee3fe6601e5ea2b5a78b95bb32dc204769e65 SHA-256: f77fb52a0a1b7115f187ccd5524460856ea5d38a0613114e993e08f32994d56a
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, with a specific detection name indicating it is a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing lure. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the phishing pretext.

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://jumiwimov.ru/strik?utm_term=maritime+lawyer+salary+us PDF link annotation
    • https://cdn.sqhk.co/zikufivol/ihagSge/wudema.pdfIn PDF document text
    • http://clientbluebadge.com/70060306643unxnz.pdfIn PDF document text
    • http://pixell.store/86352478689detp9.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/bipariduxivirej.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/farming_simulator_15_download_apk.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/notutojazidurufewod.pdfIn PDF document text
    • http://item-mask.top/project_mutant_zombie_apocalypse_mod8hzfm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/bancolombia_personas_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/48959796993.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/jomivagedaveriped.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/collegiate_deca_stock_market_game.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/bittorrent_client_for_ubuntu.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_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 5028 bytes
SHA-256: d7d84a8d5c86c1c4c0347c5229c80e3f9e074f8e895b34c1ba5900f1a1eaabdf
font_01_sfnt_off0000f99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99D 11048 bytes
SHA-256: ae955c6ddb9d4fa284e9142c8b2dae5e0699603ce013cb5ed1436c04eedf9248

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