Malicious PDF — malware analysis report

Static analysis result for SHA-256 068f0f3701c8a7ed…

MALICIOUS

PDF

96.2 KB Created: 2021-05-06 11:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 86800a1aa72169b08d0793f0fa5f6d29 SHA-1: 552e91f44864877f73dcbccdf06cc6d0c22b87fb SHA-256: 068f0f3701c8a7ed4189a02e63f3caa261fd342a89373df2aef9167ce164ba31
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 0.9994

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://bologen.ru/strik?utm_term=stevens+320+accessories PDF link annotation
    • http://toluvubub.mygamesonline.org/lutoxedavimividomo.pdfIn PDF document text
    • http://vabenawak.iblogger.org/93170782809.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/remington_11-87_cantilever_rifled_barrel.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/dell_b1160_printer_cartridge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392853/normal_5ffb44ce10868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_603120f46c866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_5fe9efeed9594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5feec6c29a0bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457014/normal_5fe44b2ee8c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_605d2f38b6de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_600bd21b61ea8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445534/normal_5fe0844e060b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_605cebeb854d8.pdfIn PDF document text
    • http://pokovata.scienceontheweb.net/kinoxifefuzaxixudujukubo.pdfIn PDF document text
    • http://punejew.mygamesonline.org/gordon_wood_the_radicalism_of_the_american_revolution.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_6048e2f229aca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixomirorubu.myartsonline.com/efficient_r_programming_gillespie.pdfIn PDF document text
    • http://gerireg.epizy.com/povufovigeson.pdfIn PDF document text
    • http://lisiguzaxupego.epizy.com/xegakaxase.pdfIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_ea3ef2c079cd453a810fe20c3dd18be7.pdf?index=trueIn PDF document text
    • http://nijorirofebonin.epizy.com/29547112244.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_21374b6ded84456d9ee332d159d872d4.pdf?index=trueIn PDF document text
    • http://rupesujutiwu.myartsonline.com/23877493588.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_off00013b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2E 5364 bytes
SHA-256: 32681e5b603c361e10771b3db4ad8ba7b16b1c9a2affd405486f1ed14ee6f7db
font_01_sfnt_off00014d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D78 11208 bytes
SHA-256: 2a44981afce203feec6b56b08f6c2f90c641fd54468e31722281cf3f3e4a240e

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