Malicious PDF — malware analysis report

Static analysis result for SHA-256 987f8513f917d344…

MALICIOUS

PDF

90.7 KB Created: 2021-02-16 03:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 50be6e961f8e4d2d34438c0b19c620a4 SHA-1: 7659d55a89bab02cc50dba075e1514f09c683742 SHA-256: 987f8513f917d3440c0b2e191778e46f3584ea83120ff37c3048ba90339128a4
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing a "Winbook tw700 memory upgrade" and pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://druttle.ru/strik?utm_term=winbook+tw700+memory+upgrade PDF link annotation
    • https://cdn.sqhk.co/befozaxulot/vgc9vhf/labutu.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/neon_green_t_shirt_templateqpbqk.pdfIn PDF document text
    • http://zathkatow.xyz/bhagavad_gita_swami_prabhavanandaycc9h.pdfIn PDF document text
    • http://zawubitukete.22web.org/itunes_mi_nht_mien_phi.pdfIn PDF document text
    • http://manthoughtswebsite.website/485585149201mk6u.pdfIn PDF document text
    • http://zekoselu.22web.org/88533630730.pdfIn PDF document text
    • http://flylovel.com/fotogokode545yr.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/b1hbcif/military_survival_skills_training.pdfIn PDF document text
    • http://moneyindia.site/mcent_browser_apk_free_jio_phonesg2tp.pdfIn PDF document text
    • http://raffle.website/bossy_verbs_worksheet_year_2q4vy8.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/1zeqhgd/22206144085.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/chedxia/rc_nitro_t_maxx_fuel_tank.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nepogewapiw.epizy.com/2014_calendar_with_week_numbers.pdfIn PDF document text
    • http://webakipi.epizy.com/vosevitilale.pdfIn PDF document text
    • http://vezexosewomex.epizy.com/devesujama.pdfIn PDF document text
    • http://sulojigemijat.rf.gd/wowalijup.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_off00012332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12332 5704 bytes
SHA-256: 8666a120b255adcea2150b38c97f9fcfd5b3546b581ab3bfd381ac3ac8b24064
font_01_sfnt_off000136b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B2 11644 bytes
SHA-256: cdebf255a13c6cd9299ab9d766bd59faeb4291f2e3ed2cf82a6fa62645fa0d06

Open this report in the interactive analyzer, or submit your own file for analysis.