Malicious PDF — malware analysis report

Static analysis result for SHA-256 024b93cdd9bd7f03…

MALICIOUS

PDF

76.0 KB Created: 2021-02-16 20:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b1ded9ad77d7e903f747e749cf2ccabc SHA-1: 988ef755498b82fc28fc79735a89eec3d9c42ef3 SHA-256: 024b93cdd9bd7f03b5564ed32888618b894c0c6e3d67acd66928e47c9d541b93
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 0.9998

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://druttle.ru/strik?utm_term=computer+networking+salary+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491159/normal_6014507ce231b.pdfIn PDF document text
    • http://xubakonuxejebip.iblogger.org/ruxeze.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/vihtgce/gowovivumom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_6025c8d5b4b33.pdfIn PDF document text
    • http://gsmall.space/cardiovascular_system_structure_and_functionqkes9.pdfIn PDF document text
    • http://imm-shoes2.club/asitler_bazlar_C3A7C4B1kmC4B1C59F_sorular7cdax.pdfIn PDF document text
    • http://damokemibojer.iblogger.org/1210663824.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/mZhgIhj/rulolabod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_5fe7058727538.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/united_states_v._dougherty_1972wwp2r.pdfIn PDF document text
    • http://verification-help.business/jibulat8y009.pdfIn PDF document text
    • http://ita-yog.space/employee_documentation_template_freer2r37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_600493d87616e.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/19579153593bhrq1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijemuviwovo.rf.gd/73843832863.pdfIn PDF document text
    • http://nizamazibenu.rf.gd/aerospace_and_defense_industry_overview.pdfIn PDF document text
    • http://dusujelad.rf.gd/broken_heart_english_song.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_off0000d662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD662 5444 bytes
SHA-256: 6f54840c7cb11bd3cb059cf6b5df692bbcecfd1ebcf0128c4c95002184105e4e
font_01_sfnt_off0000e8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E8 10664 bytes
SHA-256: 461b64b85b0605444a483f37889e9a94a6216c130ee3a43dc1eca5f94955ab0d
font_02_sfnt_off00010d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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