Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba091a71371ebc2…

MALICIOUS

PDF

81.8 KB Created: 2021-04-07 18:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aced67162844c8ae536b5f33ff63130f SHA-1: ddeccae32b8e3b2f3a5d2a4b46eae787fe03832a SHA-256: 3ba091a71371ebc28958ea9a7acdc557b4fa193ca1791a051dbd83269c842144
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://maypoin.ru/strik?utm_term=hamilton+beach+4+quart+ice+cream+maker+model%2523+68330r+manual PDF link annotation
    • https://cdn.sqhk.co/dulemokel/QXbxagg/43414319987.pdfIn PDF document text
    • http://xakaderinetatu.mygamesonline.org/adobe_indesign_cs6_tutorial.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/tuwasepopuludumu.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/ieihPja/rugby_world_cup_2015_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/9LqsTjc/86069392238.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/7GgegAv/global_strategic_management_ebook.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/nMbZ4ic/vekexovewumuvepekef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcbde881a3e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_601cfe13b9dde.pdfIn PDF document text
    • https://cdn.sqhk.co/fetuxudo/ierida9/vujisiletuliwu.pdfIn PDF document text
    • https://cdn.sqhk.co/lamimegisu/hgVgePU/boxhead_zombie_wars_2play_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_6058bc81ef935.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/qmnBjdx/guzixosezoridolijuguzuzug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450259/normal_600538ded734f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_6021fea82cec7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_ba0656d15ded441c985b8ebd8833867c.pdf?index=trueIn PDF document text
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_0c8414573d964841af3abecc3b921d5d.pdf?index=trueIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_ef8a16227792424aa95df83fe7e3273c.pdf?index=trueIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/surrealismo_literario.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/aprendizaje_cooperativo_johnson_y_johnson.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_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 5380 bytes
SHA-256: be642496c7ead390705b31ce057c7d98646cecd33e5e8f71ac016fcdb0c358d6
font_01_sfnt_off00011502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11502 10772 bytes
SHA-256: ef6aef1073c39bf2f57e7d4638715cc801f509bb9dc6b59faff6f83099a53ebf

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