Malicious PDF — malware analysis report

Static analysis result for SHA-256 8894c387a7be96f9…

MALICIOUS

PDF

67.5 KB Created: 2020-12-17 04:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ff7712c93901a4fd98d489ba349d1a7e SHA-1: 700b7fc45c20031dc3a51fb92cfc0eae58d4a14d SHA-256: 8894c387a7be96f90cfa0e380e5ff3eb67c9c13baa157595f3bd4ca5108d99da
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to downloading a manual, aligning with common social engineering tactics.

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://trafficel.ru/123?utm_term=manual+of+emergency+airway+management+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fcbaa22af54b.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/34a19b2d-8fed-4917-8dcc-a2f52112e32b/mcpe_city_map_ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54aa9d79364840850716/1606374571923/morpheus_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/type_of_monks.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5558a405d5340f34720b6/t/5fce06bd920f47545bb96b22/1607337662521/1203984358.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc01425c6d96458361db408/t/5fc8f7c957abba0089003c17/1607006155020/nascar_car_top_speed_record.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdb415687f52b6b7b2913/t/5fc7e36cdfe7bb6ff614e31d/1606935405175/fiend_oil_gun_oil_cans_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/determine_vertex_from_standard_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc551db5bcb0228a29fd4f1/t/5fce72221d54d82712810c10/1607365155138/kung_fu_heads_football_unblocked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc165fda8793968640bd5e7/t/5fcaa6acfdef016eae8a3150/1607116461375/funny_video_whatsapp_status_download_sharechat_telugu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e526c6229360ecacefcf/t/5fc12011f81c9a2a0cca3883/1606492178482/tree_diagram_questions_tes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00f8e11f6a41984810e13/t/5fc231673c6ccf69f3a744f2/1606562152038/41906771433.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfabbb474932ca2677981/1606220485173/modern_combat_5_apk_download_uptodown.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfcd42edfcd2bda918e6e/1606221013399/monitor_password_change.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_off0000cb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB48 5496 bytes
SHA-256: 140ca65d0876dc78951dd5ca399529d3d6a480ceffa2bde6f3fbde48b771dd85
font_01_sfnt_off0000de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 10376 bytes
SHA-256: c757cf7407bd59f6c74a46218916f9808892144944a42bf3c285ff80bd4151b2

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