Malicious PDF — malware analysis report

Static analysis result for SHA-256 af640e9dd34f7107…

MALICIOUS

PDF

62.4 KB Created: 2020-12-20 13:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f4ac11146d9047407cb9a0a1e50fe7ba SHA-1: 7bcbed2e95426c7a6cbe916f5e11b6b7a271ee82 SHA-256: af640e9dd34f7107e5f36794d3f62f3e8f8b37b1ec45e82d5129f4e750560243
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely a malicious domain used for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'Gundam strike freedom wallpaper'.

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://traffset.ru/strik?utm_term=gundam+strike+freedom+wallpaper PDF link annotation
    • https://fogoravirekan.weebly.com/uploads/1/3/4/3/134335139/bozixadagis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_5fbdef89f2d72.pdfIn PDF document text
    • https://xorozatu.weebly.com/uploads/1/3/4/4/134461248/1865965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5fae551055802.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/5fbd0a2445ca4f790267e9ee/1606224421191/52569852808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8734d7b9-286b-41d8-9c10-3e8d1e2100a5/39409014464.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc586961c8c741314515584/t/5fcd51911e1a4d7de13a9351/1607291282368/92858720315.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f08c104edf1d7780fb42/t/5fc5a487145a8629dc73dfab/1606788236066/u_wrench_it_st_louis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffbf92e34347c703edab4/t/5fc1002feaf37e3b64bf5546/1606484015995/lalunir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52b3ca87939686423ef9f/t/5fc77c4e788a962b7c3100c8/1606909007855/mastermind_game_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590c723e-0bfb-4412-9258-9b6ad26f608b/the_8th_habit_workbook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe23ccf8cdb769c6ac5dbc/1606296524934/vajosobubatawinupol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfb4fa97599144ebd8d24/1606286165936/the_dhandho_investor_by_mohnish_pabrai_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7bdfa2-3744-4c4a-83e5-77d4c091c28b/51005580212.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/catheter-_associated_urinary_tract_infection_idsa_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/93622792546.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_off0000b7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D5 5376 bytes
SHA-256: 1a2205ea7bbdeb4e5ec20ba58bd41e096a40111222c9abc8de035bc3a8b1cc5d
font_01_sfnt_off0000ca21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA21 9980 bytes
SHA-256: 4c8de83993c9c95ca575215fa9b30ecd680ed1d3cfa8984e73c726d492d6061a

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