Malicious PDF — malware analysis report

Static analysis result for SHA-256 762b9c5a39163c46…

MALICIOUS

PDF

70.5 KB Created: 2020-12-18 20:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e712b58ec2724a2e321fdf0a6f259276 SHA-1: bfc5365e50b17fe28aa5968518f04b21a29d1a85 SHA-256: 762b9c5a39163c4643b68d9e987ffd1602752e497ba23a460de7b3ade62a5aab
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is highly suspicious. Although no scripts were explicitly extracted, the PDF structure and embedded URI strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=legend+of+sword+and+fairy+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f93e97664415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5fa3cfabcd2c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10ada29-42a5-4bf8-a498-7b08cec64d6c/kefisiwudilijovejuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/monopolies_and_restrictive_trade_practices_act.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/33436982286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fcce91-04d4-46ba-9037-d560c9e00db3/votebike.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/bass_booster_pro_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/sight_words_worksheets_first_grade.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc198bcc6d9645836271125/t/5fc497ac3485235c8658dc13/1606719406087/downriver_news_herald_blotter_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/zevoxomasibudonotaf.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/pumulimiwegoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d49f94-3614-455c-9a68-cbd12c21c423/89899319327.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_off0000bcb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB8 7664 bytes
SHA-256: 9f9d29655170b5dc86a1a3de82a721d500e2f14c4fa82e6c037c60bdc779c8c6
font_01_sfnt_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 5308 bytes
SHA-256: 27e189a41b524efb8cb46b12633af31a398882e279a3802d8479339f2f54de98
font_02_sfnt_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 10344 bytes
SHA-256: 8f4f87467952e0937aebf79aff121cf5fa60e96d20d1d5323a4bd73100225096

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