Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9ed457bc00dcac…

MALICIOUS

PDF

85.7 KB Created: 2021-03-02 14:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 84b830b756921efed10a1b13c00fd0c0 SHA-1: faafbdba7f979194e61ee928f3b2ffa4ac8f1dd3 SHA-256: 5e9ed457bc00dcac08fffcd9a525e4535b936fb0b5f41dd75957ddf2239db6bb
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to game walkthroughs, suggesting a lure to entice users to click on the embedded malicious URL. The presence of embedded URLs further supports the phishing attempt.

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://seumenha.ru/strik?utm_term=elder+scrolls+online+walkthrough+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5fddc1357a261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_6038609e38b00.pdfIn PDF document text
    • http://jenirafona.22web.org/allow_notification_permission_android.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/asmaul_husnah_dan_artinyaogkkn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368226/normal_5ff27b159cb71.pdfIn PDF document text
    • http://setifol.66ghz.com/sodiki.pdfIn PDF document text
    • http://fozovozazu.iblogger.org/gamejoropekawawelilonut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382629/normal_5ff9a50a9f708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_60282d7bd1a84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480161/normal_5fc5bf1fede81.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/24501574746k0xfw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_602e22973f00a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fedd55cdd5e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482219/normal_60021ee036033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367622/normal_5ffe909769902.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/call_of_duty_modern_warfare_game.pdfIn PDF document text
    • http://ooovseanalizi.ru/assurance_of_salvation_bible_study8bbj1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_5ff3c45bb980c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumamuv.myartsonline.com/lenajujoduwipeduri.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/alternative_dispute_resolution_definition_and_examples.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_off00011092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11092 5796 bytes
SHA-256: 85d5e90d36cb9e0ab2e580d21ba2f7ecab097d63b7b3a2161c99ede6937b2987
font_01_sfnt_off00012461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12461 10940 bytes
SHA-256: 0f7eebadb37c0a7a2d7a38770fd888446182b874f320ac9b0ad2d6eabe6035c0

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