Malicious PDF — malware analysis report

Static analysis result for SHA-256 3316d804f9d01ca9…

MALICIOUS

PDF

82.4 KB Created: 2021-03-09 01:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0c42dc8edada6f424dcd2ee27df8c3c4 SHA-1: d22d7d257759e71f633f037b3bba34c75397516c SHA-256: 3316d804f9d01ca92507b02cd94b48415772624c385b696f8a678bd127689663
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The PDF structure and embedded content suggest an attempt to exploit user trust.

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://zajinet.ru/award?keyword=anatomia+de+la+arteria+carotida+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453729/normal_5fecf6d4e55aa.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/roman_numeral_worksheets_year_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479213/normal_6043522d7291f.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/qhejjTQ/cyberfoot_2020_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/6ihhiy0/alien_shooter_cheats_apk.pdfIn PDF document text
    • http://bumufirila.mygamesonline.org/system_programming_assembler_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/2IDhija/48274727467.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farowug/weather_report_sorrento_florida.pdfIn PDF document text
    • http://tuvawewopuje.rf.gd/zimirijo.pdfIn PDF document text
    • http://togaretib.epizy.com/dejunaf.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/lisopuzisufuxuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/18516353967.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/zatuxupifimejesokafatu.pdfIn PDF document text
    • http://pupogoxegaze.rf.gd/pathogenicity_of_mycobacterium_tuberculosis.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/piano_sheet_music_treble_clef.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/gangstar_vegas_offline_game.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/18773296469.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/dragon_scale_dice_bag_knitting_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/nejezepun.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_off00010530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10530 5112 bytes
SHA-256: 80bc547ffb1408a3e03cae58307ac4a84ed191a2045e009f8a9dbd5544b4caab
font_01_sfnt_off00011682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11682 11204 bytes
SHA-256: 76cd732a7d1f7eaee326af6f9b95fb31ea4155247bb5a52c98464a5f098e0934

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