Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c91fa03372e7eec…

MALICIOUS

PDF

73.9 KB Created: 2021-01-24 22:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0c73028e11d59d123e37ce8e715107f6 SHA-1: 2e6dab5d43c3ae1243617c99ccd58d7411de3b6d SHA-256: 3c91fa03372e7eec0415d3090740f817f54fe56ce1b353cfa600ffbd5a6e7a8f
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 high risk score. It contains an embedded URI pointing to a URL that appears to be a lure for downloading a game mod. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious download site, likely as part of a phishing or malware distribution campaign.

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://jottigo.ru/wb?keyword=dunk%20hit%20mod%20apk PDF link annotation
    • http://takipleskazan.org/valentines_edible_cake_decorations_michaelspxbs9.pdfIn PDF document text
    • http://onlinekartiadesi.com/thriftbooks_reviews_20202tvih.pdfIn PDF document text
    • http://avbox.org/kodekloud_engineer_dashboard5cdps.pdfIn PDF document text
    • http://proita.space/battle_strike_mobile_fps_game_download_apk2zv45.pdfIn PDF document text
    • http://bestplacefor.rest/slot_car_raceway_canton_ohiox7328.pdfIn PDF document text
    • http://fakaripeti.xyz/paper-_io_3d_onlinevfcun.pdfIn PDF document text
    • http://amin-ukraine.net/mineral_wells_isd6lyc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zafijukopa/electronics_and_communication_engineering_ppt.pdfIn PDF document text
    • http://zaxalamel.rf.gd/exponents_rules_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/72799320633.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/la_la_land_theme_sheet_music.pdfIn PDF document text
    • http://segixiw.epizy.com/lagu_aku_menunggu_dengan_sabar.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/fifuzufusikinik.pdfIn PDF document text
    • http://sosasofojatage.epizy.com/jijesoxarivebewuxumev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F6 4720 bytes
SHA-256: 7997a6e555a49072d97410e4029c39d4720664b478221429848bcfd090e0cb97
font_01_sfnt_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 16072 bytes
SHA-256: be2fb999d9fa71130f6d49ab47a804203545334b03c35bcd9e31dddbd9b4e51d
font_02_sfnt_off00010aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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