Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5ce6082cb7bcfd…

MALICIOUS

PDF

152.8 KB Created: 2021-05-02 03:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91720db03ef3bf8d04776ec1c4bd789c SHA-1: d07630d10bfbad39bbcba89713f3cb3168d16f50 SHA-256: da5ce6082cb7bcfda95190e3874013f936317f6e44f5bd60b11c99e2a47701d0
66 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 of which point to domains associated with link farms and disposable hosting, suggesting a phishing or redirection scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URIs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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=ti+89+titanium+rom+espa%25C3%25B1ol PDF link annotation
    • http://totalcreditreport.info/noralamixevogiminifejameipdj0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404116/normal_5fe023757a545.pdfIn PDF document text
    • http://xtreme-sport.ru/6294588569ae5qs.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/sony_icf-cdk50_mounting_template9gu41.pdfIn PDF document text
    • https://legutuxubumid.weebly.com/uploads/1/3/1/8/131872058/pegos-seluxowesana-kovetejixotipot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5fe6eabd3295c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_600de116cb45a.pdfIn PDF document text
    • http://foteraza.22web.org/singular_and_plural_nouns_sentences_worksheets.pdfIn PDF document text
    • https://bedasalisavif.weebly.com/uploads/1/3/4/6/134601990/bobejufovipixasuleze.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/b0db1ce8d5118.pdfIn PDF document text
    • http://suvijedujame.iblogger.org/93953217088.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/1883caa7-afa4-4ecd-8043-d38e0709bb8d/85428746855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b20291c-fa4b-4704-aa3f-5278e2471818/what_is_the_default_password_for_spectrum_router.pdfIn PDF document text
    • https://377d1c6c-8747-407e-9a0d-bb8234813250.filesusr.com/ugd/f0b1fd_0fcb607fd31e4131817cd8f44f62555c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/570e9bb3-faa9-4866-91d3-afed264b5c28/neranuvewebev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa64f661-7577-4c6e-8a61-56ca59ac727b/wheel_horse_snow_blower_for_sale.pdfIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_9c0f524d90504aa08ce8aed43de37873.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b55c28e-1794-41cc-9df6-1fc4e52434e3/why_finlands_education_system_is_the_best.pdfIn PDF document text
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_3a2a5792313a40f5b9c749e53b7c2174.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_664b9c5d270b4a5fa62b0fa66b29a34a.pdf?index=trueIn PDF document text
    • http://peworesafasar.epizy.com/pikugozerevajeju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FECF 5476 bytes
SHA-256: 751ec60e6d64f51727271e2406b98ed4b085009184a4dd28cf8d6627c194f300
font_01_sfnt_off000210db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x210DB 1240 bytes
SHA-256: 7fb57bcafb8dfdc1007f283aa93d51d6e9823f6ad5ee673c98b3110383ce2c26
font_02_sfnt_off000217e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x217E9 19056 bytes
SHA-256: 5d5750484f0e2ca6557f57f4aa85c13c53e9330bc201163d866851fc2812ffd6

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