Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a94126ba796a98…

MALICIOUS

PDF

60.5 KB Created: 2020-11-30 08:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb77634bbb05f1a13735b6c56974313f SHA-1: dbd12d338b92d74294456b378b162b67cc15ba69 SHA-256: 11a94126ba796a986525b151d3e441ab1db4552ab5396271594a5780dc41437f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Xbox one controller 1697 disassembly' and 'wkhtmltopdf', suggesting a lure to a potentially malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/strik?utm_term=xbox+one+controller+1697+disassembly
    • https://gowewibejeji.weebly.com/uploads/1/3/4/4/134481286/dofogepusigobuto.pdf
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/vizulararaw.pdf
    • https://zijubanefim.weebly.com/uploads/1/3/4/3/134349059/2dbc5e9bcc0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ab897340-fc21-457f-b738-208969e2a6e9/tetajejufexop.pdf
    • https://s3.amazonaws.com/liguwubore/should_could_worksheet.pdf
    • https://s3.amazonaws.com/dugibabafod/rtaa_trane_chiller_manual.pdf
    • https://uploads.strikinglycdn.com/files/4c8fd7da-47eb-4484-91ac-b8bc26be9387/free_tiktok_followers.pdf
    • https://s3.amazonaws.com/tifuwuw/lijupilinizuj.pdf
    • https://s3.amazonaws.com/tudawufed/out_of_the_box_community_theatre_columbus.pdf
    • https://uploads.strikinglycdn.com/files/2cd3ceea-f498-49e6-b75d-844390936cb6/via_sacra_rome_map.pdf
    • https://s3.amazonaws.com/xilasisefi/kaleshwaram_project.pdf
    • https://uploads.strikinglycdn.com/files/4e82ba8f-500c-4853-9e58-11658dd3c367/1719681779.pdf
    • https://s3.amazonaws.com/xesigeze/44892021174.pdf
    • https://s3.amazonaws.com/muvemasoxaji/tejomit.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_off0000b00a.bin
5357f757869111574dd29c210dfc12605724945d536b8a41d353adf0cd0f16f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB00A 5816 bytes
font_01_sfnt_off0000c3cf.bin
dc61e00798679d87ff1881cd637af7108ab8fc0dc0a0ad75758c83527befbd36
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CF 9756 bytes