Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00b80110df60c9e…

MALICIOUS

PDF

79.4 KB Created: 2021-03-19 06:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13e9d3bc80a23bb1f582b1eba3c526ac SHA-1: 9dc6898ec38309f8c85ac4fd9174b10c4368c0b3 SHA-256: f00b80110df60c9ef8be371f496545a658d2e452b0df3cebc2d82b46e2ba7404
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://pelibifir.ru/wix?keyword=age+of+mythology+cheats+chinese PDF link annotation
    • https://cdn.sqhk.co/jamolipa/hazjjii/n64_emulator_download_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471512/normal_5fdba92d14c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_5fdb8b2f0e98c.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/3674645465.pdfIn PDF document text
    • http://quickpapp.online/estructura_del_texto_literarioxafw3.pdfIn PDF document text
    • http://armlur.space/highway_1_closures_half_moon_bay7lyh5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_601a7793afe24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_604dc1b7640f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_6014a466dd081.pdfIn PDF document text
    • http://discount50it.pro/tumegasezq4kvr.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/sozubafuwexumowuxos.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/giajfhi/sega_retro_games_download_for_pc.pdfIn PDF document text
    • http://canonsburglake.org/les_journaux_sportif_algerien_enviw8v.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/djckxDI/xofipiranatatusanazedut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/clone_bitbucket_project_to_android_studio.pdfIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_45f4827f70614e4fa6eb33a0dc81bbbf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/xafozetaxumuraxuwewaze.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/what_are_the_five_constant_relationships_in_confucianism.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_90323284a58a414092c048d6b1eae813.pdf?index=trueIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_1e8e2e5ca91148cba73f30905b8a01da.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_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 5288 bytes
SHA-256: de92dc747c89a610d9aa0b2acd0e435a9b9c87a94e8e4edeeb8035d0ed0d3ed4
font_01_sfnt_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 10860 bytes
SHA-256: 40b0ebe0512fdd7aaedf8bfe1f69fec94c69be1b546ddee1a102374abf1225b2

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