Malicious PDF — malware analysis report

Static analysis result for SHA-256 147eaf387f59657e…

MALICIOUS

PDF

74.6 KB Created: 2021-03-03 00:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3ded8ced20c82dcde326e8e055eeb203 SHA-1: 204a631afafcf63ed6b49dc5cf4eabc5c00cd4a9 SHA-256: 147eaf387f59657eaee3a1b7bc8a0039e9aea667d9ab2676cd48b360eff8fe7b
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 a primary focus on 'https://maypoin.ru/strik?utm_term=book+of+jasher+audio+free+download'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of links on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

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://maypoin.ru/strik?utm_term=book+of+jasher+audio+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420597/normal_600e07b179d65.pdfIn PDF document text
    • https://fajasorefasox.weebly.com/uploads/1/3/4/3/134348900/gawoxenemobi.pdfIn PDF document text
    • http://lusoxebi.iblogger.org/67184624497.pdfIn PDF document text
    • http://gozatelaji.22web.org/unreal_engine_4_tutorials_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456996/normal_5ff61e95447dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_600fc3860424b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416786/normal_5fce313eccce0.pdfIn PDF document text
    • https://niromegezos.weebly.com/uploads/1/3/2/6/132681660/xizisezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fe901b8c9fe7.pdfIn PDF document text
    • http://kowesaxulenim.22web.org/ny_state_drivers_manual_spanish.pdfIn PDF document text
    • https://tevadurut.weebly.com/uploads/1/3/2/6/132682826/5cb4d35113.pdfIn PDF document text
    • https://terigemi.weebly.com/uploads/1/3/1/8/131856376/kesotiwiligagig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_602632eaf125c.pdfIn PDF document text
    • http://kewujedirolut.22web.org/widuxuloseso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajapelemazibog.rf.gd/7415294782.pdfIn PDF document text
    • http://zakusomob.rf.gd/moremaxabatebevadesedozet.pdfIn PDF document text
    • http://punolubumima.epizy.com/jozufosam.pdfIn PDF document text
    • http://muxofitum.rf.gd/how_to_clean_remington.pdfIn PDF document text
    • http://damoserik.epizy.com/gbc_emulator_for_android_2._3.pdfIn PDF document text
    • http://rikasajase.rf.gd/master_of_business_information_system_usyd.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_off0000e257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE257 5276 bytes
SHA-256: d66db8d8fb2b6fb946d5896725bf1b22785df0eaa0302ccd1179a80a1f0b45c9
font_01_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 12660 bytes
SHA-256: ff13b90802500532d391b2e003162c1fdf3e407c8348484e971d6a092547e905

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