Malicious PDF — malware analysis report

Static analysis result for SHA-256 312d93c66f20a40c…

MALICIOUS

PDF

95.7 KB Created: 2021-03-09 03:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: dec9bb25ccbbf25d938a80b7883ddaaf SHA-1: 97367d48a0d90b20c618e810b0314d0ad410ecd8 SHA-256: 312d93c66f20a40cc509b2d31a1c82768797d9dff4b570a2b6da96a8f2e60599
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document that contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=calorific+value+of+food+and+its+measurement+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fd932f20baeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486197/normal_6032751db0c32.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/bbb2b0625d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369781/normal_5fe44d58016ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5fcd2679e7d26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424043/normal_6003898032218.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/85450175501.pdfIn PDF document text
    • https://josojizaxa.weebly.com/uploads/1/3/5/9/135966587/2273988.pdfIn PDF document text
    • https://bimuwalunamen.weebly.com/uploads/1/3/1/3/131384226/gulola_mewijo_luwor_sapobubevuzup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450417/normal_6046aced5a3be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_6027fadb13503.pdfIn PDF document text
    • https://xajovulunama.weebly.com/uploads/1/3/4/0/134096198/6b163b88a.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/does_air_purifier_filter_smoke.pdfIn PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/69bb7e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_601261d98431a.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/40319642575.pdfIn PDF document text
    • https://bevevigulamop.weebly.com/uploads/1/3/4/7/134759368/2748060.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/xavemubof.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/86431952411.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/fufigunamurawipilire.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/el_enlace_ionico.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/30291366683.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_off00013a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A92 5264 bytes
SHA-256: 9a71a06ac8713af624269e4bf596adf25aafcdbbf9fa3c91c281fb9ec490c98a
font_01_sfnt_off00014c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C69 10704 bytes
SHA-256: 9f9dded958054ee47dd8905d68db0fdf4d6d2dee6a7c2c3826e47cdd1f1c6517

Open this report in the interactive analyzer, or submit your own file for analysis.