Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d10cf2edceccca…

MALICIOUS

PDF

74.4 KB Created: 2021-02-14 13:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f629e870c9354ee0edd92c3ce3f20d39 SHA-1: ab3080521147c544c4f7c99b379b2b689a358c1b SHA-256: c5d10cf2edcecccafabe9a7d6877bc250aa3436962629478ddfe8214041c10f5
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=google+cs+first PDF link annotation
    • https://cdn.sqhk.co/jojewezalika/cehgjS5/hotels_with_pools_and_waterslides_near_me.pdfIn PDF document text
    • http://look-hotel.com/swot_analysis_ebook59xvt.pdfIn PDF document text
    • http://ericksandoval.com/43662923995ovxoy.pdfIn PDF document text
    • http://reggis.info/smadav_antivirus_for_pc8wemf.pdfIn PDF document text
    • https://xorizetevapaze.weebly.com/uploads/1/3/1/4/131438163/1374035.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/jfPgetp/42756564452.pdfIn PDF document text
    • http://lezapogogaz.iblogger.org/23586089311.pdfIn PDF document text
    • http://esparks.ru/757003444938y644.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/a1jfbgg/xafijeziponumawugi.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/djjf8ia/meteor_shower_michigan_september_2020.pdfIn PDF document text
    • http://train-home.ru/adios_nonino_partitura_pianohs81x.pdfIn PDF document text
    • http://uplrezina.site/lejelotesiz4bnb.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/8br2hjP/black_beauty_book_genre.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebedugufafa.rf.gd/blank_black_hd_photos.pdfIn PDF document text
    • http://pavunununege.epizy.com/guided_tours_in_rome_tripadvisor.pdfIn PDF document text
    • http://nokolul.epizy.com/combining_separate_excel_spreadsheets_into_one_workbook.pdfIn PDF document text
    • http://wuwatomugexove.epizy.com/vujiwelowokunezuriganewa.pdfIn PDF document text
    • http://ximipine.epizy.com/best_rap_beat_instrumental.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_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 4872 bytes
SHA-256: 0dade26282fc2ce85244c6b7a07724bde07ffcd86068dd28eb9eda29af3161b6
font_01_sfnt_off0000f8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 10596 bytes
SHA-256: cb32e086a9f6ebdb95fac3204c269a56a1d38b4fc4de350521259c6a1becf6ad

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