Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57dac22ad60399e…

MALICIOUS

PDF

73.7 KB Created: 2021-03-17 05:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8db9c349cefdf00e2880290454997b45 SHA-1: 55044f5ecfdd2cbd5907c429b785661e7fb44b2b SHA-256: f57dac22ad60399e577cde16e70bcca5358e7a2fec8b1d76e69f22f4e7914c45
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, includes a query about flour conversion, suggesting a lure to a fake search result or informational page. The presence of external URIs and link farm heuristics indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=cuanto+equivale+150+gramos+de+harina+en+tazas PDF link annotation
    • http://jovopomutulilo.medianewsonline.com/nicomachean_ethics_book_3_chapter_1.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/ruzebimiwikej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_603a545f027bd.pdfIn PDF document text
    • http://wiruxenolap.22web.org/amana_washer_manual_ntw4516fw3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5ff81311474ff.pdfIn PDF document text
    • http://gagezejiwakale.iblogger.org/33391797076.pdfIn PDF document text
    • http://buvevolu.iblogger.org/52045511871.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/pgggqCh/27610891191.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/hajyibC/newesufes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tenowuwewid.epizy.com/2004_chevy_avalanche_repair_manual.pdfIn PDF document text
    • http://xanawuvogi.epizy.com/44251432878.pdfIn PDF document text
    • http://metukobitoro.rf.gd/shackled_2012_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d4d650-9255-4f36-ba8d-2c2e6eb9c79f/2105156998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb77e1b-6dcd-4da8-a2a1-8e24f1d98c47/68761874586.pdfIn PDF document text
    • http://mobukug.myartsonline.com/capacity_building_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7759841e-056b-4ce1-b7a3-b8c8321b28fc/what_are_the_7_spiritual_gifts_kjv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9bffb5d-82ea-4ed6-9bd3-673e088a7577/92420016280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973bc9b5-8a5c-413f-820c-56d4911fdb1c/ps_vita_games_for_sale_australia.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7F 5696 bytes
SHA-256: 70617b632c482d4c3158a29ab81b94b655fe57a9f57dad2038069240bd7f98cb
font_01_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 12268 bytes
SHA-256: 28f8b3f88ff3e8b0d8257cce428b8d13730564564be26e5440333ff5173b90c5

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