Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f133532d6f9b7c6…

MALICIOUS

PDF

80.0 KB Created: 2021-02-26 17:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 612eded224541111a9221d5d29265c9f SHA-1: ed14e28080206d9b63fa360aaab67ca715d833fe SHA-256: 5f133532d6f9b7c6184296a92106aa207f6b35d65fe3cdacfd9f0603ed900721
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 pointing to disposable domains, suggesting a link farm or SEO manipulation scheme. The presence of 'utm_term' parameters in some URLs indicates potential tracking or phishing attempts. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, possibly to lead users to further compromised sites or phishing pages.

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=what+is+the+best+petrol+pressure+washer PDF link annotation
    • https://dulebepil.weebly.com/uploads/1/3/3/9/133999512/3873913.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/hdWzgif/tazodogetisuki.pdfIn PDF document text
    • https://cdn.sqhk.co/zamupefa/rXhgNgf/36212590912.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/bezojajotanufafafesibu.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/PKJt0jh/the_room_2019_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/ja7hf0k/9797880976.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/nedexuvigufobanora.pdfIn PDF document text
    • http://begemot.space/rokatibesapisipapm2hq.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/jSzoie6/50749819833.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/hp_officejet_6500a_plus_parts_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/hscYqgc/difolev.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/how_to_repair_bose_wave_music_system.pdfIn PDF document text
    • https://nasamokazefo.weebly.com/uploads/1/3/6/0/136049887/5118907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fc5bb89d6ab7.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/igCHhay/beat_the_street_driver_jobs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satawakerexe.atwebpages.com/jupodibobixe.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/what_was_the_outcome_of_the_treaty_of_guadalupe_hidalgo_group_of_answer_choices.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_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 5152 bytes
SHA-256: 8e624228c70b078b386f1c015a3bcaa7d71bca44b93f2d7322b0d2d5d6f96118
font_01_sfnt_off00010d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D67 11072 bytes
SHA-256: 7f01babff143b81d264937739dbd1596a7af12fce78940c4d6a5a3a4ca631af6

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