Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98051cd3568f618…

MALICIOUS

PDF

79.0 KB Created: 2021-03-28 15:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e358ff550e1719f1d05b33824f777f0 SHA-1: 54535d892658e6b029e68f68c0512243fc0e449c SHA-256: c98051cd3568f61885c30cc750d75f2ec5875e71da7c33750b938d94dfa89ad8
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://jacksth.ru/award?keyword=universal+studios+orlando+map+pdf PDF link annotation
    • http://zijixiteluwek.scienceontheweb.net/can_i_get_an_autopsy_report_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/cjdhcvp/64450815184.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/HhgKibW/13320283329.pdfIn PDF document text
    • http://bnl-jobs.com/hannah_arendt_quotes_on_violencef6dzk.pdfIn PDF document text
    • http://daimontimur.org/22739024500sjb4d.pdfIn PDF document text
    • https://cdn.sqhk.co/muribirigim/ie9Oahi/mukapemaxeg.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/sEyn9gd/70481739093.pdfIn PDF document text
    • http://summ-green.fun/why_am_i_so_bad_at_statisticsx93y9.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/what_made_the_affordable_care_act_constitutional.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_600db5143c4dc.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/UjeocdQ/ultimate_extreme_car_driving_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/sChayRR/cannon_shot_on_his_bike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_60142cbc06360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487416/normal_5fc7b3f226a80.pdfIn PDF document text
    • https://cdn.sqhk.co/webaxepibi/iigdmhe/70671267421.pdfIn PDF document text
    • https://cdn.sqhk.co/fanasuzajem/ahfjbdZ/muposovifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7f5466-e04e-4a9d-8234-4618d2156eb7/13110504359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d7702c-d1d5-4867-a829-819fc70db912/the_cambridge_companion_to_kants_critique_of_pure_reason.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3323930-904a-44f1-9cc2-4577d799be73/how_do_you_cite_a_book_in_apa_6th_edition.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/tabular_modeling_in_sql_server_analysis_services_2nd_edition.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 6

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_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 5236 bytes
SHA-256: 362d586bd82563240de1f82f397d6ca7dfacd3f8a39b65ccc302898afd1ef51f
font_01_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 12248 bytes
SHA-256: 9ee0c43766135bc52b959c5ea7182c7bd3af42f1c47402882c4b3909164acbf2

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