Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c512b889c1a176…

MALICIOUS

PDF

64.4 KB Created: 2021-01-10 16:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1d89b83a1981acec894104baeff41a3f SHA-1: e62ab5c63bd54b07045c42c4b64edec1812ed922 SHA-256: a0c512b889c1a1769948b9ce55c0e46df128eeb57cec9d2550d6b64ffbfab027
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=industrial+craft+2+block+cutting+machine'. This URL is likely used to redirect the user to a malicious site. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a document.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=industrial+craft+2+block+cutting+machine In PDF document text
    • https://site-1168242.mozfiles.com/files/1168242/download_game_poker_offline_online_mod_apk.pdfIn PDF document text
    • https://site-1166652.mozfiles.com/files/1166652/chain_reaction_game_generator.pdfIn PDF document text
    • https://site-1173403.mozfiles.com/files/1173403/roku_streaming_stick_black_friday_2019.pdfIn PDF document text
    • https://site-1210859.mozfiles.com/files/1210859/voxumukozuzavamijizitipe.pdfIn PDF document text
    • https://site-1172440.mozfiles.com/files/1172440/virus_war_space_shooting_game_hack.pdfIn PDF document text
    • https://site-1172574.mozfiles.com/files/1172574/puzajasofixuzubibori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f919bd503d5d.pdfIn PDF document text
    • https://site-1199467.mozfiles.com/files/1199467/16762870697.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/20198779791.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/radio_jovem_palmas_fm_104__7_online.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/juvetaso/acer_aspire_bluetooth_software.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/axel_f_trombone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/80680976153.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/ganatelojutufovogejoxe.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_off0000bd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD42 5708 bytes
SHA-256: 65fa1727673ac7a084fce5ee6de4e2ae74c6de895a15ef28377d1a8a65dd0121
font_01_sfnt_off0000d086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 10704 bytes
SHA-256: 418ed11b98bad2c0dff6adf8f977feccb389604afa0638b8e506072019a9b457

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