Malicious PDF — malware analysis report

Static analysis result for SHA-256 402964c57b1fe338…

MALICIOUS

PDF

140.4 KB Created: 2021-03-05 07:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c63766530f579ea33de7cf2432d14874 SHA-1: 7389417a213db2f6b0e37f05fc8c81a1591bf2d8 SHA-256: 402964c57b1fe338bb6cc1348c58c734cddf1ba969bffd2cf2d35a3edc340941
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external URLs pointing to various domains. The primary URL, 'https://xajibur.ru/wb?keyword=how%20strong%20is%20kaneki%20in%20tokyo%20ghoul', suggests a lure for search engine optimization or potentially phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/wb?keyword=how%20strong%20is%20kaneki%20in%20tokyo%20ghoul PDF link annotation
    • http://digosige.mywebcommunity.org/how_to_drive_a_trailer_in_offroad_outlaws.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/Ujgjcib/all_lego_city_jungle_explorers_sets_compilation.pdfIn PDF document text
    • https://cdn.sqhk.co/dawadetugas/miawlrn/slingo_garden_play_for_free_online_no_download.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/51984243552.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/zufok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5ffc5a69ee577.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/dg2Pgg8/janejirorabazud.pdfIn PDF document text
    • https://vodakobawuvij.weebly.com/uploads/1/3/4/6/134627811/supimupenowexunewiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384159/normal_5fd02d296504e.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/will_there_be_a_cma_fest_in_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/nunexijezep/ghgdjdg/demibozagolu.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/DohfgiT/66628167309.pdfIn PDF document text
    • https://fupegaketivira.weebly.com/uploads/1/3/4/8/134887529/423093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dazenuf.rf.gd/how_to_fix_issues_on_credit_report.pdfIn PDF document text
    • http://podozedomusajor.epizy.com/kathi_telugu_movie_songs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCFD 4828 bytes
SHA-256: 5093a236ce8f7564a6dc3f86a6b82b57485d81762bab6a734cafc329b8eeb9bd
font_01_sfnt_off0001edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDBB 5164 bytes
SHA-256: 41a3a78bcfbfe4f6eec0ac186d5374a83a473468eeb69a97741c3c5fa6719bc3
font_02_sfnt_off0001ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF5B 11020 bytes
SHA-256: 8d6bd95737dc94a477b984d772e8363f76d94da131eef638dcde851d92754d07

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