Malicious PDF — malware analysis report

Static analysis result for SHA-256 432dc07ad6b90e78…

MALICIOUS

PDF

81.2 KB Created: 2021-03-19 06:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bde1b7375b712ae41b2cc11e89ffbb5d SHA-1: b351d6e4a3cea25aa2325e7039465fe92fceb0e9 SHA-256: 432dc07ad6b90e78ef0f9719c7b388af035533125ebdd1d8e02cedb86c21f422
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 0.9996

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://gimoguvi.ru/strik?utm_term=how+to+analyze+and+critique+a+poem PDF link annotation
    • http://rekatilugo.iblogger.org/does_chloroform_dissolve_in_water.pdfIn PDF document text
    • http://mx50off.pro/59264254546g08on.pdfIn PDF document text
    • http://kengoru.space/57062197746yfxk9.pdfIn PDF document text
    • https://cdn.sqhk.co/kerodamajop/gfiezeJ/mobogenie_app_2018.pdfIn PDF document text
    • http://megatorg.ru/my_holmes_tower_fan_stopped_workingxcd7w.pdfIn PDF document text
    • http://shopeuro.pro/rezon7665u.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/sugar_blues_lyrics.pdfIn PDF document text
    • http://paktum.pro/5547303817764bft.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/ijZiewd/tikera.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ganetevenovumo.rf.gd/4911647787.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_7ae98c059d5c4f628c99ef8d08586fb3.pdf?index=trueIn PDF document text
    • http://lelurofu.rf.gd/83036078491.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/likekegadasil.pdfIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_d5e1c4d500294869be557c6320db4523.pdf?index=trueIn PDF document text
    • http://zumadibud.epizy.com/functional_occlusion_dawson.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_2e5bbc3d93444c2fb36c0de8c34febbe.pdf?index=trueIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_6805fa2223044889b955faa93f74be89.pdf?index=trueIn PDF document text
    • http://wutejaxevewef.myartsonline.com/sotafeturag.pdfIn PDF document text
    • http://duponinet.epizy.com/tivegatomiladudap.pdfIn PDF document text
    • http://bomowufawifebi.rf.gd/air_force_1_shadow_spruce_aura_green.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_e8301a5cb8bd4658b8d801c2bc0105fa.pdf?index=trueIn PDF document text
    • http://lupumik.rf.gd/54842031122.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 5372 bytes
SHA-256: c86a850a810679554effa7916e7639d7b43e7beef5ac640c50516bd81d432e7a
font_01_sfnt_off00011212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 10788 bytes
SHA-256: 8ea00a16b83d7a76e243c778235858a630c672e256372ffb01493a5a6757b9e0

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