Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4a310e4baf680b…

MALICIOUS

PDF

77.3 KB Created: 2021-03-09 02:27:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3662eaf0aa3943d7dbbdee39207cda9e SHA-1: 0369bb768c253ae54fef416c271cf8a2d602f0f8 SHA-256: be4a310e4baf680b2c61f1fe88349cf2a346faf6630f16e539ac82d258b41560
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including one to 'fokemale.ru', suggesting it's part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to the 'wkhtmltopdf' tool and a title about resetting a remote starter, which serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=how+to+reset+remote+starter+after+battery+change PDF link annotation
    • https://cdn.sqhk.co/wisewuguv/ghJKm8a/fiwuwamisaduzupazixigesis.pdfIn PDF document text
    • http://gejejok.iblogger.org/large_format_film_cameras_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_5fe9daed49833.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/windows_10_startup_batch_file_not_running.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5feeeea8c834c.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/eOjaGGb/versace_gold_chain_reaction_watch.pdfIn PDF document text
    • http://wovunenuk.iblogger.org/32286533853.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/tratamiento_de_apnea_del_sueo.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/8dvtigc/88299994707.pdfIn PDF document text
    • http://goropefixujifep.22web.org/gopinikejinawakori.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/does_calisthenics_build_mass.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_6027f9a1b2b0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381752/normal_5fcb6384c74bc.pdfIn PDF document text
    • http://duwemoguf.22web.org/how_to_fix_my_bernina_sewing_machine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zolusodo.epizy.com/lamabalitovi.pdfIn PDF document text
    • http://zerimokima.rf.gd/24757238029.pdfIn PDF document text
    • http://punegejofuj.epizy.com/25713045174.pdfIn PDF document text
    • http://gojexigubobe.epizy.com/27125362602.pdfIn PDF document text
    • http://volomuladifute.rf.gd/21715797559.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF046 5556 bytes
SHA-256: d84a6a2de1c68fabed3cc564e144d95331fe3bfb80133f274829c81a9f467d0d
font_01_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10916 bytes
SHA-256: f04ec253ddf54cab856444b772c27f3231a9b396d1bfe2341aea5c8cbda5e593

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