Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9caa2380b476da…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 20:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 65c881aef7750b045fa5f8a1a38526a2 SHA-1: b10aea8df6ad1514dd0d21d39df93efad0abf69f SHA-256: ca9caa2380b476dae84508d56ff6ba75c2b98694f4a3c0b4de8bb267001dccad
126 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 0.9998

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 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://gimoguvi.ru/123?utm_term=stock+trading+journal+spreadsheet+free PDF link annotation
    • https://cdn.sqhk.co/wisivelu/7jbmjfK/dexegoxonugiru.pdfIn PDF document text
    • https://cdn.sqhk.co/pitazitizej/jcieFif/the_little_black_boy_analysis.pdfIn PDF document text
    • http://reduslim-ufficiale.website/514483720684p51w.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/sql_join_interview_questions.pdfIn PDF document text
    • http://gafuvufafokujop.sportsontheweb.net/cannes_france_map.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/gdvkifD/opiniones_excursiones_para_cruceros_shore2shore.pdfIn PDF document text
    • http://tixshopclub.space/xulexapotaa1zo9.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/b3t7ihE/60388240926.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/PijDjaq/paint_sprayer_for_cabinets_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/ighjjfg/zulamiromojoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/IB7jdgd/kobepa.pdfIn PDF document text
    • http://dlkmvkoenv.info/casio_g_shock_rangeman_replacement_bandhk8u2.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/hdNCg8T/shreya_ghoshal_all_telugu_mp3_songs_download.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/what_words_should_not_be_capitalized_in_a_title.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/ji1gjOV/kasosavunetetafe.pdfIn PDF document text
    • http://goodsfor.life/popevonametapeug4v.pdfIn PDF document text
    • http://drovazvenigorod.ru/2014_dodge_durango_rt_manualyyycf.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/idhhEB1/redasezolofori.pdfIn PDF document text
    • http://byt-upak.ru/asus_m2n68-am_plus_driver_for_windows_8.1ygnwp.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/igWie1v/tetutafukalifot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://investorplace.com/options-trading/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_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 5660 bytes
SHA-256: 60beff57d9bc863d1e41b4e0f346c96067b87405beabbfb04d72db47942d7a9c
font_01_sfnt_off00011107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11107 11280 bytes
SHA-256: d2419b5ef09d777dca817fbf226d6dfae5742a5f8e9f82abe51d94e0dac0cda0

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