Malicious PDF — malware analysis report

Static analysis result for SHA-256 6319addc81720ed6…

MALICIOUS

PDF

85.2 KB Created: 2021-03-28 08:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c31a7850da946eb41fc9e868b5a305bb SHA-1: 34470cde3ebe232c7e4bca2d389dc75af10a1b62 SHA-256: 6319addc81720ed6c7c4be8c3ecd4bd4e2a5d4e515b5856b4d11d22978a175a1
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jacksth.ru/strik?utm_term=what+do+you+mean+by+political+radicalism+in+germany PDF link annotation
    • https://cdn.sqhk.co/mivuxakadu/h2hikRB/34924238135.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/95364693513.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/ji4jege/amazon_alexa_show.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/how_to_use_breadboard.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/Xkeiegf/singa_kannada_movie_audio_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/jdgejak/celestia_ludenberg_execution_roblox_id.pdfIn PDF document text
    • https://cdn.sqhk.co/midubevine/YONReMl/72017348164.pdfIn PDF document text
    • https://cdn.sqhk.co/subetudagoli/jfje5je/84775761574.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/eOmjjjf/runiletorivatoga.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/OEGieif/97104758962.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/eojbKYL/wwe_2k_battlegrounds_gameplay_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/hcH0VeW/dobafokamebawe.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/i9yhbgc/marupi.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/847cf0b419da85.pdfIn PDF document text
    • https://cdn.sqhk.co/guzorata/cfbBMAn/outlier_math_equation.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/agckigZ/bukuzuzinuxuwozokitafaku.pdfIn PDF document text
    • https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/bb0026.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/aOgiBjg/iphone_haircut_prank_app.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/dedinavesute/nenaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/fulalemisaneretejulopev.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/76423951906.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/how_much_captain_underpants_books_are_there.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_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 5744 bytes
SHA-256: 6bf893171aaa65c41ee6f7d8476a3dd98d4bf0d0db471e0b96272062723e9a9f
font_01_sfnt_off00012032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12032 11792 bytes
SHA-256: b6aa095ca4cd83936003bf5126d8d1315db967e6ecbedf7d45a1fc019315fb33

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