Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1cd5f4ff0f93fa…

MALICIOUS

PDF

74.2 KB Created: 2021-02-27 16:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 502b73aea0d609e0caf9a6daa45a4034 SHA-1: 3a4f8f4a12bbdc2ea0d23e76214c5b5e4cd765a5 SHA-256: 0a1cd5f4ff0f93fa40efe288dea30e2b8ce7494eadcf787bf2dc56b62b8d9f91
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to potentially harmful websites.

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://jacksth.ru/123?utm_term=the+beautiful+and+damned+summary+sparknotes PDF link annotation
    • http://wotidoteked.mywebcommunity.org/31120719557.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495387/normal_60002d9ad5083.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/suviwunesovitit.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/Ajf2gfh/70409048157.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/dapuxesopigexarogutot.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/myles_munroe_books_waiting_and_dating.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422912/normal_5fe0fb099ca15.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/duOnjby/82976882973.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/where_do_chicks_come_from_book.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/aMgjhfM/52510059095.pdfIn PDF document text
    • http://timinome.getenjoyment.net/puxifazadetelojavub.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/fichero_de_actividades_didacticas_espaol_primer_grado_primaria.pdfIn PDF document text
    • https://cdn.sqhk.co/tixuniwe/gbgggOq/pokemon_diamond_and_pearl_tv_show_characters.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/52289230456.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/17022840783.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/c4hfieH/girl_halloween_costumes_2020_pinterest.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/how_to_install_sena_20s_evo.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_off0000e4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D0 5536 bytes
SHA-256: 21f7e1d10d86d048440a7ed1c008e5249ecaf3b3fa28e57e4ef0360695f2e566
font_01_sfnt_off0000f778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF778 10536 bytes
SHA-256: 22532a9be5d06075ee3096211fef27b2eb9f35024c3d46bf8dc45e52f600b577

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