Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c29d6d3225b7e3a…

MALICIOUS

PDF

75.6 KB Created: 2021-03-14 17:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c5a7da1c3a3a105e5fb5f04c5c89356c SHA-1: 5e4b2543babf8381823408a06ca918e411f7d760 SHA-256: 9c29d6d3225b7e3a273bed9ef1f47eca952188a024ab49407ecc4cd99951f7de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://bologen.ru/strik?utm_term=what+are+the+different+method+used+in+mining PDF link annotation
    • http://probmake12.xyz/knight_brawl_hack_downloadl21by.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fee0d6ec360f.pdfIn PDF document text
    • http://wubunof.22web.org/what_are_the_ways_of_financing_economic_development_in_nigeria.pdfIn PDF document text
    • http://pusokum.66ghz.com/java_string_format_long_number.pdfIn PDF document text
    • http://feziweninepiv.iblogger.org/advanced_ip_scanner_full_version_free.pdfIn PDF document text
    • http://dkblogin-de.com/petsafe_bark_collar_not_working2fqrv.pdfIn PDF document text
    • http://muwenigijevas.22web.org/data_warehouse_tools_and_technologies.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/challenging_cognitive_distortions_worksheetsypv41.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/1197519061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_5fca45de952e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5fe6ce1ab8fb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duloduxu.epizy.com/windows_server_2012_r2_datacenter_iso_download.pdfIn PDF document text
    • http://xukenefurirog.epizy.com/173187165.pdfIn PDF document text
    • http://kosener.epizy.com/24813451663.pdfIn PDF document text
    • http://pomujip.rf.gd/ge_avantapure_water_softener.pdfIn PDF document text
    • http://juvumutat.rf.gd/history_behind_white_christmas_song.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/zuxevaferew.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_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 5304 bytes
SHA-256: 97506e733b33274a5d61cfb72748af0f6fa8fec59fb714987f78cd1079fc81be
font_01_sfnt_off0000fdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 10220 bytes
SHA-256: bdcefa2886976b4dca23cdc7f72afb406a9d6b39486928f8a5326c43b11ea0eb