Malicious PDF — malware analysis report

Static analysis result for SHA-256 c088da02a4fb8d9a…

MALICIOUS

PDF

98.4 KB Created: 2021-03-04 19:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6be4ac44e20171fa0991996cf964604c SHA-1: a6eee7b4a8294e93fb9a592d84707f7ffe404857 SHA-256: c088da02a4fb8d9ae2f91434284b8d41aacbfbcd2741498321ed6ff8be9c5846
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains or subdomains, indicating a link farm or SEO spamming operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the primary goal is to redirect users to potentially malicious or deceptive content hosted on external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://lozipotod.ru/strik?utm_term=what+is+the+message+of+auld+lang+syne PDF link annotation
    • https://cdn.sqhk.co/mitugejaxel/jevbpjc/vopotosuxusutamowuxutore.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/lapobofo.pdfIn PDF document text
    • https://vofovolovun.weebly.com/uploads/1/3/1/4/131483423/nizamad.pdfIn PDF document text
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/3c6f05b0.pdfIn PDF document text
    • http://vovality.club/60431806488qnsw0.pdfIn PDF document text
    • http://blue-tick-central.com/petsafe_collar_stopped_working1l41c.pdfIn PDF document text
    • https://cdn.sqhk.co/bulelovuroga/icicYha/brooklyn_ice_cream_factory_truck.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/xenegisisigogupoxuvecznip.pdfIn PDF document text
    • http://astropsychology.website/vukogih56jr.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/JvyghaD/best_spanish_to_english_translation_website.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/sukerexo1eb4.pdfIn PDF document text
    • http://yoptan.space/53022803201gy18j.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/bejhgiO/black_widow_spider_bite_pictures.pdfIn PDF document text
    • https://wufavupo.weebly.com/uploads/1/3/4/3/134319323/zuwat.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/1983640.pdfIn PDF document text
    • https://tovawifigilad.weebly.com/uploads/1/3/0/7/130776196/3200458.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/5hifhf4/fall_mens_clothing_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/rOYdhh8/map_master_for_minecraft_pe_apk_download.pdfIn PDF document text
    • https://fazodokivev.weebly.com/uploads/1/3/4/0/134018208/9442a30.pdfIn PDF document text
    • https://cdn.sqhk.co/bubesuzax/wjiojie/stickers_whatsapp_naruto_jutsus.pdfIn PDF document text
    • https://jewinovezuxumat.weebly.com/uploads/1/3/1/4/131407424/gizesakanad_bagamutumot.pdfIn PDF document text
    • https://turugoduzo.weebly.com/uploads/1/3/0/7/130739986/3722119.pdfIn PDF document text
    • http://tegor.xyz/zakotaletigodifekgt3c.pdfIn PDF document text
    • http://optamorem.com/gupugisipejj8msq.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303D 3664 bytes
SHA-256: e853f89ca3a2f6183aab9ebaee38558a2b547d539506ede759404a9723489a8a
font_01_sfnt_off00013d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5B 5340 bytes
SHA-256: 4d968781943358afa0a9cd88d411c4c3adea8c125d1c3acab115ac78460f8c8a
font_02_sfnt_off00014f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F79 14112 bytes
SHA-256: ee3c5418bd4ddacdd663ca672b0b0d6364343b99c06dc3284518376dbf972b45