Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb66a20c24913bdb…

MALICIOUS

PDF

67.2 KB Created: 2021-01-25 21:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3b076f5cbbc063ddc8bf5c8fd5c7069c SHA-1: 9aeda9df18d614822f7f8f4a15c12bb335d01b07 SHA-256: bb66a20c24913bdba1d7306f5aef3d51b10f178391eb6c313c660e9ac1a371d1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://baarspo.ru/123?utm_term=autopage+rs+730+installation+manual', which is likely a phishing lure disguised as an installation manual. The document body, though heavily obfuscated, appears to contain metadata related to wkhtmltopdf and a date, suggesting it was generated programmatically.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=autopage+rs+730+installation+manual PDF link annotation
    • https://cdn.sqhk.co/gebijowokobe/sbnjhhj/dj_sound_effects_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/gl00Sgd/animal_coloring_bookmarks.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/dw9gic4/xexapagu.pdfIn PDF document text
    • https://cdn.sqhk.co/dabigewom/hhgeKGu/paint_blast_4x4_reviews_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/diihihi/lego_marvel_superheroes_ps4_cheats_deadpool.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422906/normal_5fe74321d2bf4.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/9myzTjb/best_smart_connector_accessories.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/RBiwtuh/massive_mimo_beamforming_antenna.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/eJVhhVB/download_pixelmon_mod_for_minecraft_1._14_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483833/normal_5feb9425615c2.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/Pij7jho/flappy_bird_blink_cara_bermain.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_5fd7ab9fabab6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468554/normal_5fd080487ec4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5fc7536cc6d8c.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/semuxemakaw/ailet_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/yajamana_basanti_song_please.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/peter_pan_jr_musical_script.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/pompeii_tickets_audio_guide.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_off0000cab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB1 5516 bytes
SHA-256: 13e4092fb779d6b1e893bac72b58e3bb34c0abb11217c2214121074fc04006b3
font_01_sfnt_off0000dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD62 9968 bytes
SHA-256: 42a648dcbb73af2672996760a327be3b436bdc96dac401b6b7151741fcab6d69

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