Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a3b874f5f75347…

MALICIOUS

PDF

76.3 KB Created: 2021-03-31 12:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5d42e900126cbdab39a6e775c0d478a6 SHA-1: ca277127c4b39052574db5c12997e42d7882cc2d SHA-256: 02a3b874f5f75347774679412f7dffe2204d09094ab76677c52c3aaf00c93185
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL suggesting a lure related to a 'fat ninja game hacked'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

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/wix?keyword=fat+ninja+game+hacked PDF link annotation
    • https://wutusubefesuw.weebly.com/uploads/1/3/5/9/135961291/3c7426acb8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_5fe4347d63ef1.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/43906614833.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/dokipulobitubixatul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5ff92e2e1dc8a.pdfIn PDF document text
    • http://tolujupa.22web.org/pavuzajedamusarokasaseva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_605a52821feb6.pdfIn PDF document text
    • http://rufujatev.iblogger.org/alienated_america.pdfIn PDF document text
    • http://datulosuwila.iblogger.org/66527692587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_6007e2f6d9c70.pdfIn PDF document text
    • https://juzoliposiwe.weebly.com/uploads/1/3/4/3/134322138/9087949.pdfIn PDF document text
    • http://fijixedi.22web.org/curvilinear_coordinate_system.pdfIn PDF document text
    • http://danuseko.iblogger.org/78005635910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujoselaserib.epizy.com/kixekujam.pdfIn PDF document text
    • http://kobevito.rf.gd/womepamajetipateten.pdfIn PDF document text
    • http://putudodizisag.epizy.com/liu_cixin_the_three-body_problem_book.pdfIn PDF document text
    • http://zomoludefifev.rf.gd/showtime_rotisserie__bbq.pdfIn PDF document text
    • http://xidutukas.epizy.com/math_tricks_hindi_download.pdfIn PDF document text
    • http://gesonumakokobal.rf.gd/febrile_seizure_guidelines_2018.pdfIn PDF document text
    • http://vosezonupufix.epizy.com/40235033568.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_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 5144 bytes
SHA-256: a93ea29d7a7e8bede080bc963711e42acbd7d1607cbb8d83bac3840334db3884
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 11332 bytes
SHA-256: 8450aa04bf2ea166c5ea8950515fdbf011edc52c7fd872ee32a42447746bd7d9

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