Malicious PDF — malware analysis report

Static analysis result for SHA-256 167c43aafb0962a5…

MALICIOUS

PDF

75.8 KB Created: 2021-05-20 21:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 21b9ed41b807ccc9982f0b80e53cf4f7 SHA-1: 981889414049c48d4eea7ba342d15cca784b53ee SHA-256: 167c43aafb0962a5da17dc3dbb77af3c5f681c4dbb96ca14f769df30f3992643
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 'leonvi.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains text related to unit conversion, potentially serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=how+many+inches+in+24mm PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fd10195dfc01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495974/normal_5fe06317145b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496372/normal_605a42eb44548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_600e22c9ce866.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380379/normal_5ff54e4117ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5fd3311e08ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5fe9708f01e2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5fd281ef8f4a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_605db76f7b7ac.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/xupizewuxere/94163437869.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/star_spangled_banner_violin_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/friends_taking_sides_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/70946833777.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/do_you_have_to_calibrate_omron_blood_pressure_monitors.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/kimegabuvojapepijobapiv.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/nepetudesifofepanufol.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/tp-link_tl-wr841n_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/how_to_listen_to_music_offline_on_iphone_8.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/92207077801.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/45771216906.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_off0000eb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 5284 bytes
SHA-256: 63a0589c1e62eaaf69db2eb3250c6672adc3466fb9a185fea252671a7062a9db
font_01_sfnt_off0000fd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 10812 bytes
SHA-256: ba5898f469dd1d9c0128d152e4a892f99e7916459b8470fd22db31fa6eb546e6

Open this report in the interactive analyzer, or submit your own file for analysis.