Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d1556ed3a6f598…

MALICIOUS

PDF

75.6 KB Created: 2021-04-18 15:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 31a2580bee9d36b1b45e7dcf2e018048 SHA-1: 2f8f8ba9725ef552895c84fe75ef3983c7e716cc SHA-256: 00d1556ed3a6f598a13f38f408193c3fb61f905d1c311093c31f611b8d933442
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 0.9997

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://vilenefex.ru/strik?utm_term=how+to+write+the+electron+configuration+of+an+element PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403428/normal_6015470f5de16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_6063c834632dd.pdfIn PDF document text
    • http://viwaginuf.iblogger.org/get_gartner_reports_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ffa14d54ba8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387589/normal_5fd03cf14139f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_605f8c9cb3df7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488807/normal_5fccc21255eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_604d22386d61b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489607/normal_6025818131224.pdfIn PDF document text
    • http://zipaxuko.iblogger.org/best_rear_engine_riding_lawn_mower_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://regisebe.epizy.com/nebodudozopadomiri.pdfIn PDF document text
    • http://kapixij.epizy.com/gate_virtual_calculator_for_windows_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46716ffe-b5a5-4621-b014-e28fddf3c109/tecumseh_5_hp_engine_oil.pdfIn PDF document text
    • http://bobamexexaru.rf.gd/alex_rider_stormbreaker_book_pages.pdfIn PDF document text
    • http://momevoke.rf.gd/middle_school_physical_education_lesson_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cec9471-e9f6-407e-b32c-18abdb81fead/young_living_essential_oil_recipe_book.pdfIn PDF document text
    • http://mizuselafu.rf.gd/nikon_d400_price_in_nigeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5786f3e-b53f-4bf2-a794-9070ecf542ad/battletech_wiki_mechs.pdfIn PDF document text
    • http://sebedugufafa.rf.gd/nms_surgery_casebook_2020.pdfIn PDF document text
    • http://lemijafuw.epizy.com/1812457505.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_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 5168 bytes
SHA-256: 0af076d7749e6d74a3ccd0070eaa13deaa07ae6a24cd453bf39f6d3ab445be20
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 10588 bytes
SHA-256: 899dd551105c18c08512db2ce6775ba8d504c2a5c16c76a41ad6e1c8e2be14b2

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