Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5211b815023bd9…

MALICIOUS

PDF

80.1 KB Created: 2021-03-21 06:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cd71643ee2887431e14ee623fad2a5b1 SHA-1: 5ae9b10b09d822440359dfde4ee1a8fda1f8d607 SHA-256: df5211b815023bd90b4a5cc373b785340242a9231ead9ee113af61d9902681a8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=malayala+manorama+news+today+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446400/normal_601aaa0940f98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_603851eb0b99b.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/bosiwofume.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/82187734834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_5fea0c7109518.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/will_tesla_increase_range.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/38041265799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_601e06cbd518e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467017/normal_5fdd33a57f1b5.pdfIn PDF document text
    • http://stakingyfi.com/karcher_k2_pressure_washer_not_workinglciup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481834/normal_5ff9a8bec437b.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/zirumujijexuresajuki.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/22443926185.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/what_are_the_osha_requirements_for_ladder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490542/normal_5fd0e60a924db.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/pobixedele/news_broadcasting_script_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/67793125289.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/crossfire_series_summary.pdfIn PDF document text
    • http://teropisarazo.myartsonline.com/rinimu.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/crystal_reports_2016_system_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/jedodibelexuvivixakuvore.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE700 5388 bytes
SHA-256: c59a8976984f6a2d4c014fddb30ec0ff4aa61715a8b1049dafec61670a1d897b
font_01_sfnt_off0000f95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 10600 bytes
SHA-256: 4f9ca6e1f1885935b9c590c20ad6aaab515f5698a2d8b7da2992188b2f969df4
font_02_sfnt_off00011dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD3 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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