Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5efdf3a656cf8ad…

MALICIOUS

PDF

75.5 KB Created: 2021-03-05 13:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 01de3e95fc11055db13a02981fe86338 SHA-1: 6a1ce467fdab9b4d256d6b19b1c095cb5065eaf5 SHA-256: c5efdf3a656cf8adbe1e47cd38d3322eb478595f5f5a4f54f1cd66d90fc7b5f8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=how+to+prepare+for+the+pe+exam PDF link annotation
    • http://lodujenoxo.iblogger.org/jagilezuwugifutipokifizav.pdfIn PDF document text
    • http://fotaper.iblogger.org/66179500183.pdfIn PDF document text
    • http://gemapijipepegi.22web.org/coulomb_s_law_experiment_report.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/Sghrigj/18657919583.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/ginevixisarotujeduzo.pdfIn PDF document text
    • http://wadixokup.22web.org/76109131531.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/jhbW3jb/68053176492.pdfIn PDF document text
    • http://positarinirib.22web.org/philips_norelco_aquatec_changing_blades.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/69900336055.pdfIn PDF document text
    • http://rilisibutetibe.22web.org/what_does_the_bible_say_about_sowing_financial_seeds.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/iecijWK/play_ruzzle_free_online.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/doxaw.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/TAiihiP/tie_dye_hoodie_wholesale_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_a51094fc22934affa39dd0db5460b196.pdf?index=trueIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_cb98fd2593ab40c8b287714dc3bf2336.pdf?index=trueIn PDF document text
    • http://zowiseli.epizy.com/dhaka_board_result_marksheet_2018.pdfIn PDF document text
    • http://wivovazu.epizy.com/harry_potter_hogwarts_mystery_merula_duel_guide.pdfIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_cbddbf3ac33a4fb78c5406a662ca5d48.pdf?index=trueIn PDF document text
    • http://bopetupuvito.rf.gd/825016559.pdfIn PDF document text
    • http://juxalizabopi.rf.gd/59280107235.pdfIn PDF document text
    • http://buwomonemagup.epizy.com/dividing_complex_numbers_worksheet_kuta.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/introduction_to_american_deaf_culture_chapter_10.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_0a88287bd65042bb9ad7b0330d197951.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_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 5052 bytes
SHA-256: d9b30953b15b8ae5b3f2867c16dccb158367d1675124b6beff5df9452897e13a
font_01_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 10640 bytes
SHA-256: 491580a71cd4a96d471bfd14276820de47cebf5264ad66fbc2af2475c78a57dc

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