Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4632fa90749dd9…

MALICIOUS

PDF

83.9 KB Created: 2021-05-14 13:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7356eae8a005335d5e9a6cd0e72b6650 SHA-1: 03cd585ef47c80bb9d197f3d98d1038ca398c899 SHA-256: 0c4632fa90749dd9a85884f71ee71f0b419690f2ef8194524aedabbba4f37f06
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. No scripts were extracted, but the PDF structure and URL analysis point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=star+citizen+uec+ship+prices PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447253/normal_60639200122b5.pdfIn PDF document text
    • http://priz24.site/mbo_folder_service6tm4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500889/normal_5ff622cabf41f.pdfIn PDF document text
    • http://monstergym.ru/short_stories_for_grade_3_downloadh85dm.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/miss_peregrine_home_for_peculiar_full_movie_in_tamil0ma87.pdfIn PDF document text
    • http://goproonly.com/37309390539b8mk5.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/60396367520dhatn.pdfIn PDF document text
    • http://adanakebap.org/casio_g-shock_carbon_core_guard_mens_green_strap_watchc4odn.pdfIn PDF document text
    • http://lnstagramverifycentre.com/homer_iliad_book_18pu191.pdfIn PDF document text
    • http://world-wild-shop.com/former_bookbinders_philadelphia6651u.pdfIn PDF document text
    • http://acupofjacob.com/words_that_start_with_duct1xd11.pdfIn PDF document text
    • http://znalomstvavip.site/44961072438glncx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_6029d478c0ea6.pdfIn PDF document text
    • http://porn77.design/9359319690ayqnw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489244/normal_5ff1adbeb58a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jipawivenuzinu.rf.gd/fishing_report_ridgway_reservoir.pdfIn PDF document text
    • http://zumepif.rf.gd/58403925726.pdfIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_7fe1ab51e89d4573a8072c30c368105b.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_fe71e1ad390a475f90a7770ad355e8c6.pdf?index=trueIn PDF document text
    • http://vigiwadovu.epizy.com/86630505080.pdfIn PDF document text
    • http://xogeguf.rf.gd/temple_of_minerva_function.pdfIn PDF document text
    • http://maviwapas.epizy.com/sorirapuraredixalovuf.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_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 5140 bytes
SHA-256: 0a02801b7ecdb6c40a5659b50b070a9c6c256ebebc19ff4ce50fd1f94c34ac2a
font_01_sfnt_off00011bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB2 11692 bytes
SHA-256: 5799ce95cc66d2b55a46844afbca7c8b4868569087f1a609910fa942bae0959b

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