Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2dfdfeafafc1f4e…

MALICIOUS

PDF

122.5 KB Created: 2021-03-05 16:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fe92d502ca073ac6f6fcf9cee548efe5 SHA-1: d141d1cef16e3a56ee362b6166c06dbf6b8f6a08 SHA-256: c2dfdfeafafc1f4ef1cc6281fd3481b3d7aa9844467749e67de5948f6678f519
186 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 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://dugedepap.ru/strik?utm_term=inferno+dante+pdf PDF link annotation
    • https://junapeborizako.weebly.com/uploads/1/3/4/4/134443413/7732b1703.pdfIn PDF document text
    • https://cdn.sqhk.co/welosezu/ZKNY9ii/cute_animals_short_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/ascH4ih/chords_for_nigerian_worship_songs.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/toro_t5_sprinkler_head_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/tafolaku/hHTifBL/university_of_montana_missoula_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/hiYT4ii/regal_cinema_movies_times_square.pdfIn PDF document text
    • https://jukamonasob.weebly.com/uploads/1/3/0/7/130740128/bafirijize-rofowos.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/jSjdhbW/spanish_civil_war_arrives_in_barcelona_1936.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/97023172145.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/3e16c2c0ec745.pdfIn PDF document text
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/gesexesum.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/download_lagu_eclipse_ncs_mp3.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/9396308.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/jl3hjjd/exothermic_process_and_endothermic_process.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/Yhj0hct/romantic_coloring_lovely_heart_coloring_books.pdfIn PDF document text
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/vejekibi_dowidamatido_bovifenovorupu.pdfIn PDF document text
    • https://fizubuvi.weebly.com/uploads/1/3/5/3/135301632/puvenaligitixojexajo.pdfIn PDF document text
    • https://befojawukirafa.weebly.com/uploads/1/3/4/8/134855882/nirotetozaw.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/a4cadc802e.pdfIn PDF document text
    • https://cdn.sqhk.co/pikevasoze/h9ieias/jopuvokorifijupav.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/best_above_ground_pool_heater_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/ijbdel9/9829788639.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
    • 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_off0001a597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A597 4760 bytes
SHA-256: f76b2eb35aa1027ed8c7cc8e47411de9f40b13e66a02271f7cd705d35597bd1f
font_01_sfnt_off0001b5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5DA 11992 bytes
SHA-256: 78f4479e86b7bb3f8135a6ca4dbc66717a41de1ce0178d3a74ba4c2ccef1c828

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