Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57f4dc25044053e…

MALICIOUS

PDF

73.3 KB Created: 2021-02-08 10:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: deda02c4a619fc823975f6976cdd46bb SHA-1: 10d6470dc8b73d72e4aac0bc1a1f589b6b9eba8b SHA-256: e57f4dc25044053ebc7b31e7460d065d2edfab4746618ec4927e15517de3c181
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://seumenha.ru/aws?utm_term=kyushu+electric+power+co+inc+annual+report PDF link annotation
    • http://revivinof.iblogger.org/marksheet_of_sol_du_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/Qhcghig/whatsapp_sticker_maker_apk.pdfIn PDF document text
    • http://ejinaya.com/pokemon_insurgence_rom_mobiley7y0e.pdfIn PDF document text
    • http://iciko.xyz/workplace_chat_clientq9cve.pdfIn PDF document text
    • http://waystep.site/fozelopalomaloohr5i.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/7gdWEZt/holy_roman_empire_map_1450.pdfIn PDF document text
    • http://rawenspant.online/mapezadijedozubojoztjrd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416506/normal_5fe0db40e2a62.pdfIn PDF document text
    • http://ita-bio.space/honda_cr_v_2020_brochure5j7i9.pdfIn PDF document text
    • http://vsspb.ru/nadigerofagixolamogutn3evp.pdfIn PDF document text
    • http://vykupavto54.ru/wegawozuvemapitajiguxo97gee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369519/normal_5ff00ba021c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_5fd678c93c23f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_5fda929f1eeb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagisejokunego.rf.gd/61515902448.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15C 4700 bytes
SHA-256: d230fa1d40909e1b6f859b77b905797746e7b601258069139328439887bee69e
font_01_sfnt_off0000e1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DB 5184 bytes
SHA-256: ec7425a72cee6dd52a2d16de9b8ea99ee297584d63a387305728f3680f3ca659
font_02_sfnt_off0000f398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF398 10740 bytes
SHA-256: ddaf5607858d265ad918fa51e61d1850f4cf591aa7c79d9ad01579471540692c

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