Malicious PDF — malware analysis report

Static analysis result for SHA-256 d276b854c293204c…

MALICIOUS

PDF

37.5 KB Created: 2020-11-06 18:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8558e8b912eee7b41402b4260ed1e148 SHA-1: 92e689c81bef6344b8bbf00f568f2e78ed2d2d47 SHA-256: d276b854c293204cbda62ff8e36fd9d63e4cb01e26556b739468179a07246b06
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs supports a phishing or malware distribution attempt. While no scripts were extracted, the document's structure and embedded links are indicative of a lure to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffset.ru/aws?keyword=toro+owners+manual+38742 PDF link annotation
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/gaxozijeja.pdfIn PDF document text
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/63bd17.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/potole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5f914d6cd30d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f8cb269683c2.pdfIn PDF document text
    • https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/1948663.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/kibavutibeved/game_boy_app_download.pdfIn PDF document text
    • https://kuzosetaz812614874.files.wordpress.com/2020/11/black_ops_2_level_hack_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/introduction_to_agricultural_engineering_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8862e05-89e5-4073-af19-2deaa483e09b/nasawipunedaf.pdfIn PDF document text
    • https://sozutamigop.files.wordpress.com/2020/11/62453205096.pdfIn PDF document text
    • https://pusewekamavo.files.wordpress.com/2020/11/lugipuzisikikupuvepupe.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.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_off00005402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5402 5528 bytes
SHA-256: 141670a1f4e849de5353d918d7226570a568f4ff3709415937d9eea12da18f39
font_01_sfnt_off000066ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CA 10172 bytes
SHA-256: 0ff178f5e9fc1dec740dee721adc8c6a7be0c8ad5bc5f007e897bc6a958242d8

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