Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce45416dc7fa854…

MALICIOUS

PDF

99.2 KB Created: 2021-02-26 21:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 5ae570a134756f521de1a0047524d836 SHA-1: 1095e6ea5f48f19f90b91083b244cda6206b9ea2 SHA-256: 2ce45416dc7fa854c7177afe0a9be01326e994e06dc1d39c46725c0792198255
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, 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 links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://zajinet.ru/wix?keyword=thirty+helens+twitter PDF link annotation
    • http://fabimepela.22web.org/what_are_some_fun_icebreaker_games.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/cathy_lee_crosby_net_worth.pdfIn PDF document text
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/7d119d121e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386597/normal_6037fada960d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5fe4ab72dbe69.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/what_does_dreams_are_the_language_of_god_mean.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/78463689490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_6001805a315c2.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/technicolor_tc8305c_password.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/65457422198.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/siletutumenixovetajigot.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/how_to_animate_blender_2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_60168d896cba5.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/68d89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zavinawotomuvef.epizy.com/guzoredabesepukadise.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/85986117076.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/66144249420.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/fetimotomixoluz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B96 4708 bytes
SHA-256: 6fce8a019f24382619512a8d258b1d16350b9216f4ee1366f063616d4106eb01
font_01_sfnt_off00012ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA1 7892 bytes
SHA-256: 115b4edb368ffdeab7506aa78c4a7866801a9fbdd49fbdc9580b0187103ba789
font_02_sfnt_off000141f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F6 11316 bytes
SHA-256: d8774b04169ee74cf9c3d4f529ab1527f259559b0e2b70d181afb952a6c2e2a6
font_03_sfnt_off00016891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16891 16404 bytes
SHA-256: 718d360ac7f6cdb01157bea13bcef4c639ce979dd1abe75777b42b2633944ab5

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