Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad441d3fa7e5ef95…

MALICIOUS

PDF

73.2 KB Created: 2021-02-12 06:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 05359a37e2c44956b5cead026e38a2aa SHA-1: 5a7819545adf18c4b46cfb21163fb50f484a0743 SHA-256: ad441d3fa7e5ef95d25ac827536bcc48542b1d3b49599da7587c06fd015123cd
134 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. The presence of URLs like 'seumenha.ru' suggests an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=cookie+clicker+hack+apk+ios PDF link annotation
    • http://penaleduduzib.iblogger.org/windows_7_ultimate_64_bit.pdfIn PDF document text
    • http://gegapaxibu.22web.org/m_a_pass_movie_moviescounter.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/aEGjbhe/life_flight_pilot_salary_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/iCSkXgc/75233638584.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/gfhhi3c/zombie_slicer_card_coin_master.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/g1vGxdW/death_invasion_survival_hack_apk.pdfIn PDF document text
    • http://funuretebinuzos.iblogger.org/acceptance_test_report_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/jiihjay/national_geographic_telescope_nt114cf_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/bridge_to_terabithia_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/53145692960.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/giligawomav.pdfIn PDF document text
    • http://wisubiko.rf.gd/appraisee_comments_on_appraisal_form_examples.pdfIn PDF document text
    • http://gezibetaw.epizy.com/cbse_class_10_revaluation_form_2019.pdfIn PDF document text
    • http://bavidoripo.epizy.com/34717166349.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/logikegubapisijepisog.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_off0000e302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 4988 bytes
SHA-256: 87646e1cc972bf581690ca1a3640df691a79a2a3c04a7c295d96b1a2f78d2b5a
font_01_sfnt_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 10504 bytes
SHA-256: af4638829227fb4aad78518737dbebdbb4a09e76fefa4abecaded2f3c6bd51ad

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