Malicious PDF — malware analysis report

Static analysis result for SHA-256 e465f6bbaddacaf2…

MALICIOUS

PDF

110.6 KB Created: 2021-03-15 08:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c71a16bd45f77919ba8f01c924cbe3e3 SHA-1: 5e566d23e0bd79fd3a4b5416b3aa7dd84d539e2f SHA-256: e465f6bbaddacaf2409e17b9382e9619116badaa172b4ef6ddea7e56965c8658
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The embedded URL `https://soxebez.ru/award?keyword=exercice+automate+programmable+industriel+pdf` is a primary indicator of the lure used.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/award?keyword=exercice+automate+programmable+industriel+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373264/normal_6046cc96e77ac.pdfIn PDF document text
    • https://gorejorifal.weebly.com/uploads/1/3/4/8/134888975/fexilujuxoporaxetun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375358/normal_5fcaad7783e75.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/giggibU/49451729601.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/doBhbha/emiway_song_tribute_to_eminem.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/2gcgf5G/castle_defense_2_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/ajaiejf/dujorozunurojiteb.pdfIn PDF document text
    • https://maludanojuwido.weebly.com/uploads/1/3/4/5/134591959/834306.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenemu/pAihieR/76106628865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458829/normal_60048aadf05c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483331/normal_5fe7574fdc6fa.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/VGjDBCI/72502052038.pdfIn PDF document text
    • http://penageli.getenjoyment.net/78380712868.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/thamMhh/71982858656.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/wiaihlB/global_smartphone_penetration_by_age.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/iaialhh/dark_wolf_wallpaper_hd_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/zjakihM/vefitugeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5fd34c6a3a1bd.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/90436022104.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/KgdhfFf/thora_birch_best_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/P3ggGXX/happy_birthday_brother.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxujewov.myartsonline.com/complications_of_malaria.pdfIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/musufewexuxavalora.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13826 5640 bytes
SHA-256: 7ae4ff9841a03b61d6bf856b59bdf62711b5d2886e0213064732f1d88dd4a91d
font_01_sfnt_off00014b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3F 27332 bytes
SHA-256: a1a85960fe7b4d1c61e75e12950cea7e263a2335a9f6587ad0878e240cf26870
font_02_sfnt_off000194fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194FD 16240 bytes
SHA-256: 7122d46ea35d358a5998bbd43c06aa3d65e505e6a694ac8d1e394cbf5d561542