Malicious PDF — malware analysis report

Static analysis result for SHA-256 448eb8a22f7a1433…

MALICIOUS

PDF

84.3 KB Created: 2021-03-25 09:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b61e515cb98b761076541e779d593f93 SHA-1: 059a8b1e9aad43bb22cc367abcc1335d26f592e4 SHA-256: 448eb8a22f7a143398ff4300d5690218bff09dfc27fad4765f30ddbf8cef9dde
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs, including one pointing to 'ponafet.ru' with a 'shark tank' keyword, suggesting a phishing lure related to a popular show. The presence of multiple disposable hosting links further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=organa+keto+shark+tank+episode PDF link annotation
    • http://sepoxudozixo.sportsontheweb.net/nababisaxujep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465704/normal_60049eda75d2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417319/normal_5fec734a51fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416136/normal_601ff5a01c4f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447888/normal_5fc9db3d52528.pdfIn PDF document text
    • https://cdn.sqhk.co/pivifilogopa/ihfheid/8702159895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_5fd6808ae94b1.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/Qgigvji/lalamusetomu.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/jdRijyA/food_truck_icon_png.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_601dcee95d0e8.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/app_para_aprender_ingls_gratis_sin_internet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5ffe2120ce8bb.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/brain_herniation_types.pdfIn PDF document text
    • https://cdn.sqhk.co/sivumazudi/ujfjihE/tozumukonexefurixoxi.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/zoxagojiwamogasera.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_052e0b6cb1d045f1aa7ed6a827add99e.pdf?index=trueIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_510b3576091046d39f84a1b19df8ee5a.pdf?index=trueIn PDF document text
    • http://pakapenabu.atwebpages.com/87894872227.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_785466ff6ce6419c94aed903b3a428b0.pdf?index=trueIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_741d5123c1234a01ab9d347cea29675e.pdf?index=trueIn PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_b85ae61051ac4066b26548baf9b37859.pdf?index=trueIn 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_off00010ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB2 5280 bytes
SHA-256: bb4b28ecc90443dc2353deaed48a5ec84e8ba1577c62a2425ae5eae43889ce85
font_01_sfnt_off00011ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA0 11992 bytes
SHA-256: ed28c404f1d83310a5f057ffffd5305def44dda01e833dd8b53924c640d7ef3e

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