Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d0bde50f80e025…

MALICIOUS

PDF

70.5 KB Created: 2021-03-13 20:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fcba1f73c457258f6d6c82fac2528cd8 SHA-1: 20c48fd171afc89ff2ac0dc70c2c4e85c7c47d76 SHA-256: 97d0bde50f80e025aa84f1e76fafbc3f0fd5a719d3f64f17bd7d836b3435c002
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to a disposable domain ('jacksth.ru') disguised as a free book download. This suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

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/award?keyword=the+bullet+journal+method+ryder+carroll+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407304/normal_6043f1863ece4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_603acb61a1e55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_6043cc8659fa7.pdfIn PDF document text
    • http://everydays.space/what_is_the_max_speed_of_a_moped1bh0y.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/59728814770.pdfIn PDF document text
    • http://about-igsupport.com/tattoo_machine_builder_the_bulldog_ftr867.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/concave_and_convex_mirrors_ray_diagrams.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461250/normal_5fdd1a5656c3b.pdfIn PDF document text
    • https://cdn.sqhk.co/kujusiru/gFjbnhh/buwonaripure.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/cjejeja/server_remote_desktop_services.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/kepimogafiwogaruf.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/skyrim_how_to_become_a_powerful_mage.pdfIn PDF document text
    • http://alphabitx.com/96835774159xn260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_60248755d7063.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4643b304-cc1f-4ab5-91aa-0fadf60dc0a5/27470602855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c400b232-067f-457d-8705-7fdf9f9d4085/kamugosogizorudewowok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be86e998-6c71-4f27-a919-d895f1f6e1fe/army_pay_chart_2020_bah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98b70da-b683-4ecc-b79e-a558185b6d6d/27624180906.pdfIn PDF document text
    • http://koriwironawuva.myartsonline.com/comparative_and_superlative_adjectives_worksheet_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4864243c-0448-45c0-a02a-d6137fe91a79/what_to_do_if_someones_pet_dies.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 8

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_off0000d46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46D 5576 bytes
SHA-256: 8cb4c58a75259cc2075432fd67aa5a65bc12fb59e90a97340957044938e02070
font_01_sfnt_off0000e74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74F 10860 bytes
SHA-256: 0c76a9aa0473cb52bdbaf5658d3dd76f0acd6e1d883d8144ed4612bf41a651de

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