Malicious PDF — malware analysis report

Static analysis result for SHA-256 289b106806008cbd…

MALICIOUS

PDF

92.2 KB Created: 2021-03-06 08:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9da00c94341c4ef34b55dc06507cd01c SHA-1: 1891fd590a6e22975cfa74c7a6c3f3c00d776dc9 SHA-256: 289b106806008cbd8de0cce7b00128ccdce217870c851bfe32ebd92e5e15b208
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/wix?keyword=shaman+talents+classic+leveling PDF link annotation
    • https://nibotilujegaw.weebly.com/uploads/1/3/1/3/131381886/8864286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_60391bc820e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_600bb5dc62c7a.pdfIn PDF document text
    • https://meluwirukumipi.weebly.com/uploads/1/3/1/4/131483006/66642686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_5fe95e2452833.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/eb4cb1580be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465688/normal_5fe412a2583c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5fddc266c9e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_602cd92e35296.pdfIn PDF document text
    • https://jufomefafuxujo.weebly.com/uploads/1/3/4/8/134890319/a5533.pdfIn PDF document text
    • https://limazosit.weebly.com/uploads/1/3/1/3/131380555/nejuretarerup.pdfIn PDF document text
    • http://pajebunekelisom.22web.org/31793392525.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_402ac043bb904d11919fff7b2f1a0d8f.pdf?index=trueIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_a555e2e71bf3411996ce6d457e0f9d45.pdf?index=trueIn PDF document text
    • http://tibupud.epizy.com/xexadizeva.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/878457205.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/92876180900.pdfIn PDF document text
    • http://xutojolalu.epizy.com/piwozebigagilobodorexek.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11959 5280 bytes
SHA-256: 3ffb7d0ce98cc2759def3c2141eb5d03bd3f0f30d488cf3b21f7afebbfe6f8de
font_01_sfnt_off00012b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B36 10276 bytes
SHA-256: 0fd97f2284129ea5b32b9758f3ab4c09ee3e3d9986f2ffe4f9f22e118995a9fd
font_02_sfnt_off00014e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7E 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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