Malicious PDF — malware analysis report

Static analysis result for SHA-256 3845dac44d24aa35…

MALICIOUS

PDF

65.5 KB Created: 2020-12-08 23:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5867ce456e19750af35496bd3190cbbf SHA-1: 7220b0880d3480bfcb37f9b94ac5cc2a7a727e84 SHA-256: 3845dac44d24aa35c984680156cb7aa85a206ce3bb1ac0a78016fdced7fd3f6c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ML and ClamAV heuristics strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to a 'cd player for car usb' and mentions wkhtmltopdf, suggesting a lure to a potentially malicious product page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://traffset.ru/123?utm_term=external+cd+player+for+car+usb
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sezebepit/omnipage_18_update.pdf
    • https://static1.squarespace.com/static/5fc5d3e7a87939686429f1a7/t/5fc619551972c46e3c6ef6c4/1606818133874/40382943559.pdf
    • https://static1.squarespace.com/static/5fc36642bd14ff0dd2ac8625/t/5fc7b6083d56556d1447aba4/1606923786704/fly_game_online.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcff4fec0a1d2b4e562366/1606221647469/indiana_hand_to_shoulder_center_fishers.pdf
    • https://s3.amazonaws.com/jedobufudajewu/junifozutedive.pdf
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc2be57173fb5383bfdb0a4/1606598232405/que_es_un_tesis_aislada.pdf
    • https://static1.squarespace.com/static/5fc0e99fa13a450babf41659/t/5fc1e83a7acac6192a05d888/1606543418693/toyota_corolla_seat_covers_walmart.pdf
    • https://s3.amazonaws.com/vonusirukete/timex_indiglo_wr_50m_cr2016_cell_manual.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ec13c02f22b9d03bca7/1606373058949/indian_peace_commission_significance.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ec.bin
bb84726f8f9567f9032499f8425aada062273ceaa7dd8f5587ef031fecdca6ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EC 5416 bytes
font_01_sfnt_off0000d76b.bin
28d1bea82281ade976a559b7c5124535db1c48564181520f8db80a79251b2230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76B 9992 bytes

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