Malicious PDF — malware analysis report

Static analysis result for SHA-256 5354b2e177e324e4…

MALICIOUS

PDF

77.1 KB Created: 2020-12-09 06:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff0f08396cc02f2ee628d7c9df5f685d SHA-1: 1c13f79e12bbcc867fc5c01f0af04f914d4d6d4a SHA-256: 5354b2e177e324e470dee7be3811b51c3490294624b8d6421e5967a1dd99fa5a
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 critical heuristic firing for ClamAV detection. An external URI pointing to 'trafffe.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body contains obfuscated text, and while no scripts were explicitly extracted, the PDF structure and embedded URI indicate a malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=enhanced+native+trainer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5f8f47a92d7db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fb8bfd684067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_5fc544e23bce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5f9c4bb7d38ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_5faefd0ea755b.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/5fc55f236b97992eb5798b5c/t/5fcba9c01880ce05e84f806e/1607182785041/robot_warfare_mod_apk_revdl.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc583aebf71053ccb2ee7e6/t/5fcdde5b83d2ac65cc359b0a/1607327324271/werewolf_5e_stats.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5811288c99b6d37c67bb2/t/5fcd83e1f94b6402b23214ae/1607304162238/60540361060.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f56dd26ff1194f8deacd/t/5fcc2f4cc836a917f9fe54e6/1607216974059/ganebow.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc396e768612547ed6ed8ff/t/5fcb0f5e1880ce05e8446b15/1607143262897/basketball_training_equipment_for_shooting.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefd45147b14804f7d594/1606283222096/7936039966.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b629affbf90a66e985ea/t/5fc1aa9318e72e5fdb166f95/1606527635650/holt_mcdougal_answers_algebra_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/betefuven.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB87 6416 bytes
SHA-256: 2c4cd2f1fda7a68eeb81c013192e381dbe8ba147c14f5bbf09a6b7e6fd893723
font_01_sfnt_off0000db53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB53 4836 bytes
SHA-256: 7f77ee8471ff75521077b24f569dbbdb5144c2757eceb98a2f396085906d4e33
font_02_sfnt_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 10676 bytes
SHA-256: 24890fde99487a7a9822c6bb23c3dabd1f11c175c5faf2ac73cd35adfe89341c
font_03_sfnt_off0001106c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106C 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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