Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c64453253f8d01c…

MALICIOUS

PDF

84.6 KB Created: 2021-03-27 10:50:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 818e84b66c51b780a06aae3837f7e365 SHA-1: 223680ed88b07cfd8f342eca8750fdeb141d4779 SHA-256: 1c64453253f8d01c9858d8ff37274635bc859c5c87942d4566b01a2f214eb585
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a malicious intent to redirect users to potentially harmful content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to deliver malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/strik?utm_term=netflix+the+white+princess PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489045/normal_5ff806450df3c.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/nemusozejekepaxusegutise.pdfIn PDF document text
    • http://foyou.store/the_entertainer_personality_compatibility5gm3y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380083/normal_5fec3612b90dc.pdfIn PDF document text
    • http://mail-autoscout24.net/how_does_a_rudder_on_a_plane_work1nkvp.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/VIprFx7/mivuxusukanok.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/fjrjhgg/oasis_slide_away_lyrics_poster.pdfIn PDF document text
    • http://topstudy.fun/10655611132m7xjw.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/iHgd0ia/gisotoxaresefunufufane.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/58374003004cyvyx.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/uQhcjiU/cake_topper_maker_online_free.pdfIn PDF document text
    • http://vukufitu.mywebcommunity.org/store_keeping_procedures.pdfIn PDF document text
    • http://sanelobazigi.medianewsonline.com/fugiwinipitululomudirutod.pdfIn PDF document text
    • http://lotobajigufar.mywebcommunity.org/22092324387.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/introduction_to_c_programming_book.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/jfQhsgd/45234356399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_602b6488e6c94.pdfIn PDF document text
    • http://graatorama.fun/lei_de_murphy_significado_em_portuguesr7w90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://detuzexowo.epizy.com/what_is_the_best_alarm_system_for_a_motorcycle.pdfIn PDF document text
    • http://setudobebo.epizy.com/standard_normal_distribution_table_negative_and_positive.pdfIn PDF document text
    • http://regadozemi.epizy.com/employee_resignation_letter_format.pdfIn PDF document text
    • http://dixolasafu.epizy.com/zuluzukatof.pdfIn PDF document text
    • http://bodagoge.epizy.com/39954208457.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_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 5020 bytes
SHA-256: 26be101d6a57ed9bbe2f9d29251c5cfc2d39965dcea953b5f68f438895c97c62
font_01_sfnt_off00011df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF4 11096 bytes
SHA-256: 6a298de828bff0a0ee3017c9419e7fdf302123c95c0709b034151f3c916c8ab1