Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e73f0c9b1a5556c…

MALICIOUS

PDF

69.1 KB Created: 2021-03-23 14:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e7f2b83323d5ce96c8269772b44ca9d SHA-1: 87e4136aa36c9da53b6a9593c15ed95610e448d5 SHA-256: 3e73f0c9b1a5556ca4f840544a7f665861a4602c72866829dae80a47f21b21e3
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://xezojetit.ru/wix?keyword=flame+test+worksheet+tes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407782/normal_600733307a1c3.pdfIn PDF document text
    • http://kononameve.mywebcommunity.org/astm_a36_steel_plate_specification.pdfIn PDF document text
    • http://rekijiwowak.scienceontheweb.net/wood_adhesives_chemistry_and_technology.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/4632858086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_5fd2887c25aa6.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/chess_puzzles_mate_in_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_602c66b348bb8.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/how_to_get_stock_in_transit_in_sap.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/59354256509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470533/normal_5fd3d5498d704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486745/normal_6045fd4b39ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_6041dd699f925.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_59b623f0bf954483894999d40d97f16a.pdf?index=trueIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_2d1e80c6eb5344b890128ed8e33c8b94.pdf?index=trueIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_9508e6c57ddb4f688eb1f722cb1036c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mijumomub/majiguboxevokexoxenif.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/snapper_riding_lawn_mower_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/how_do_i_put_my_paper_in_mla_format_on_microsoft_word.pdfIn PDF document text
    • http://vexolofifete.atwebpages.com/olivetti_lettera_22_vs_32.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/nibusukejalux.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_3134e43c87f84bfcb32bbd9e2fa7dca5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vanatul/2006_chevy_malibu_ls_owners_manual.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_off0000d2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D4 5036 bytes
SHA-256: c60323339e064722b8d610f0653614ec3977f8f822bd3c2c8c1b9166dd25dea3
font_01_sfnt_off0000e3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DB 10380 bytes
SHA-256: f11548625eeede89c1644f0159e2cf83b150af613b350dea5f7c65ea25088cb0

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