Malicious PDF — malware analysis report

Static analysis result for SHA-256 2715e59ff22bfdd9…

MALICIOUS

PDF

76.5 KB Created: 2021-04-04 05:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0eaced6cffb4eb017c9c1ec938e60ae3 SHA-1: f5afdac41a8fe428447fd21950210aac9d482da0 SHA-256: 2715e59ff22bfdd9d601279fd07c64eab6835485d984a41fc9c3646f5c798a6d
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-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://pelibifir.ru/strik?utm_term=how+to+check+circular+saw+blade+size PDF link annotation
    • http://italysummer.fun/mulibudiwikuboskcy86.pdfIn PDF document text
    • http://ranking-se.com/players_handbook_advanced_dungeons_and_dragons7vw8p.pdfIn PDF document text
    • http://feyakast.online/cessna_182r_maintenance_manualv6pca.pdfIn PDF document text
    • http://awpmode.com/228638406981s1w1.pdfIn PDF document text
    • http://zespodsvetkoy.site/64200686150fbk7z.pdfIn PDF document text
    • http://shoop-ff.ru/demotefmjjgz.pdfIn PDF document text
    • http://lolkek.xyz/pemegiked4hfk3.pdfIn PDF document text
    • http://ca-management.website/la_panza_es_primero_riuslkrvt.pdfIn PDF document text
    • http://hesap-al-sat.com/6_man_tent_with_fitted_groundsheetd8e1y.pdfIn PDF document text
    • http://forexgeeks.net/denufafavobb3wk8.pdfIn PDF document text
    • http://gufutaca3.xyz/1667911749122zbb.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/pijoxalosanijopufanep.pdfIn PDF document text
    • http://poopo.ru/fiweridiklwjwk.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/gofuzuzazetetaluw.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/zirexugutufavetabeji.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/cb17d9c8-2d56-411c-83f2-dcadb8be8dcb/50619696167.pdfIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_f4a7f77fa3884245ab2ad03d1b32d996.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7fc6ef-6e9d-431a-8bf0-ff57e7acabc5/19210579569.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_9ed86b911d034696ae0fe68f81822fea.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 5332 bytes
SHA-256: d57eab61f5a8cebbc528ec32a851f6343f2cee8c1a6fa26a7d22ccdbda919f79
font_01_sfnt_off0000febb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBB 11272 bytes
SHA-256: 8b8c1068dcdf1498be0318d8a7f0ceb8dee5d17f7cc611c1771d70c16e5428a0

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