Malicious PDF — malware analysis report

Static analysis result for SHA-256 4538ea69327844c5…

MALICIOUS

PDF

63.7 KB Created: 2020-11-30 11:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b9fa413193c8c25c8c9399cd318150c5 SHA-1: 81c1b3ab407130b38339a6d39945f738b53ad43d SHA-256: 4538ea69327844c5165da43067161c508c8ffecbff17b302e8c804723db08d08
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'dark souls intro cutscene' and authoring information, suggesting a lure to disguise the malicious URL.

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://trafftec.ru/strik?utm_term=dark+souls+intro+cutscene PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408707/normal_5fa93889ab19c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5d0e9b1ed03538d2954d/1606376719479/port_royale_3_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/lv_pet_insurance_claim_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af755f70-9fce-45e3-bfeb-e5b2d23f3518/libiwajinudepavorofidedup.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/commedia_dell_arte_mask_contest.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/lease_agreement_template_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/best_answers_for_interview_question_greatest_weakness.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5b96e18c5c478ef35ac9/1606376343796/61200944934.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/zemegexojupitujemaxupid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f4a62e34347c70445090/t/5fc421dd9b1ed035385f17bf/1606689245516/zitajojaperasazexuwebazuw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefa9f81c9a2a0c672391/1606283178535/fisher_paykel_washer_parts_gwl11us.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf496ccb3e0f57714594de/1606371693050/lyrics_for_7_years_old_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f4078787e879896c419e/t/5fc49cc4fa04221c71b27f25/1606720709165/fokirenurojekopasoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf16fe18c5c478ec0ab95/1606283632111/inappropriate_christmas_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf70fc15-27a0-4978-9d8d-bcb42e87f701/warframe_ps4_judgement_points.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_off0000c255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC255 4856 bytes
SHA-256: 35dfd6172b68eaab988efe61849e05e4362721ffe078e86b029cfd49221cb6b8
font_01_sfnt_off0000d2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 9088 bytes
SHA-256: e3fdcc9bdc3a22c8a162818e112f09655273ac3780248d3dbf66fa9aa4938bf3

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