Malicious PDF — malware analysis report

Static analysis result for SHA-256 89061fab60996ea0…

MALICIOUS

PDF

69.3 KB Created: 2021-02-27 20:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b05989f6f6963528cace9929a0de422a SHA-1: 30abaf682558182057b5c3873bf3bd90e8f17f84 SHA-256: 89061fab60996ea0ec7c3665d068849c8a57a7b3a5f45e444abe2ec99ada8706
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URL `https://botokaw.ru/123?utm_term=troy-bilt+tiller+manual+download` suggests a lure for downloading a tiller manual, which is a common tactic for distributing malware. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest it may contain embedded malicious JavaScript or exploit code to facilitate the download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/123?utm_term=troy-bilt+tiller+manual+download PDF link annotation
    • https://cdn.sqhk.co/libuzewis/jjhXnwK/5038653499.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/93510641081.pdfIn PDF document text
    • http://golixudib.mypressonline.com/metro_2033_redux_librarian_walkthrough.pdfIn PDF document text
    • http://shothard.site/accrued_expenses_balance_sheet_deutsch1zeei.pdfIn PDF document text
    • http://bilkan.fun/marxism_and_socialism_similaritiesz5ycp.pdfIn PDF document text
    • http://topcreditscore.info/tugejaode9.pdfIn PDF document text
    • http://segway-wheelchair.ru/jplay_crack_6.221zoz.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/the_kissing_booth_road_trip_book_ending.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/logo_gmail_fundo_transparenteqxotr.pdfIn PDF document text
    • http://zoom-omsk.ru/vejedezhank.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/roheIjj/89580537952.pdfIn PDF document text
    • http://endi-itali.space/bulimosovumagujugumixosow3i2b.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/dgchdey/68972521117.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/kofabube/boom_beach_operations_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/google_ads_fundamentals_assessment_answers_november_2018.pdfIn PDF document text
    • http://viropamel.rf.gd/66237755970.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/stronglifts_5x5_advanced_spreadsheet.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/what_does_a_black_heart_emoji_mean_on_snapchat.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/i_can_only_imagine_lyrics_sheet_music.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/cookie_sheet_chicken_pot_pie.pdfIn PDF document text
    • http://varakofobugomo.rf.gd/evenflo_exersaucer_triple_fun_bouncer_instructions.pdfIn PDF document text
    • http://xegefonupekowa.epizy.com/metal_sheet_embossing_machine.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_off0000d443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD443 5108 bytes
SHA-256: a7d658a8c421fc0121f4770a621d12fcf71412caa561c4d31b6ef4dfa0ca4e60
font_01_sfnt_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 10324 bytes
SHA-256: e9576ea93704a67bf07aebc8d6cff4ccea2e6a14621e1b3c1b8eeafa61d15414

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