Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff2428aa3a766fb…

MALICIOUS

PDF

77.6 KB Created: 2021-03-18 16:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5c792fd9a91d00d59e9dd7d5f2dba8d9 SHA-1: ac7b3ea880c869c4ccdc6480e3f187746116fc27 SHA-256: 6ff2428aa3a766fb9b74628f1ec20b9254d8ec6875667d149698465939ebd0e0
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one prominent URL pointing to a site offering information about Casio G-Shock watches, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=casio+g+shock+5081+ga-100cf PDF link annotation
    • http://geleostone.online/cvc_words_puzzleslio87.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/90999072103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_602d71ce5724d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_604cdd48b0f1f.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/37689303392.pdfIn PDF document text
    • http://zesaguzijor.mypressonline.com/93535852211.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/elementary_differential_equations_rainville_7th_edition_solution.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/ragomifesonajilunusexun.pdfIn PDF document text
    • http://wownatural.fun/exercises_reported_speech_2o_bachilleratogzn69.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/tunetidogolewegalipa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490364/normal_5fe461b3434c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_600ad823b3989.pdfIn PDF document text
    • http://keepxufi.space/vitisogortpqp.pdfIn PDF document text
    • http://topvideo.design/38697726842b5nwz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugoxesoteko.myartsonline.com/37143964102.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_cfc495abeab84313813b597d71a2181e.pdf?index=trueIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_1d0b2be9cf6d4894b12adec9c57d3175.pdf?index=trueIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_51e2f06e6d554c2392206fc2f17929b8.pdf?index=trueIn PDF document text
    • http://moxosutemow.onlinewebshop.net/nixawo.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/30075859588.pdfIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_c83943fe122547f19e3872afaa06821f.pdf?index=trueIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_a5cac9d726b049069ac6cd4f538e7f7d.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_e44d1433928041ea8f997b88d6b86eb0.pdf?index=trueIn PDF document text
    • https://80ce5912-1c67-4773-adf4-abf614566e91.filesusr.com/ugd/acb48a_9bf9d21c4cc14ec6b710d2fe5048611d.pdf?index=trueIn 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_off0000e39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39E 5528 bytes
SHA-256: 44957e927901e1512724d08371a82f1598495c9a6f19980643629115f571e42e
font_01_sfnt_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 15692 bytes
SHA-256: 50bc884bc7d8ebe50dbf238b6ce2e4cf482e5de7ec0a799def4cddeb50212140

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