Malicious PDF — malware analysis report

Static analysis result for SHA-256 972d15ec0d8b9038…

MALICIOUS

PDF

84.9 KB Created: 2021-03-03 21:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 685e5df645826edff18e687d1533fd30 SHA-1: 28122cf7809d1b713db0a9c9afd9472719183e1f SHA-256: 972d15ec0d8b9038caebc83b06ad667391d3065f31a1353bc748e46d5f732fe0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing lure, specifically using a fake password reset notification for an HP printer to entice users to click on external links. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to distribute malicious content or conduct further phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://ponafet.ru/award?keyword=how+to+reset+password+hp+officejet+pro+8600 PDF link annotation
    • https://cdn.sqhk.co/rijomawonuj/xCgjIig/notification_notification_sound_manager_app.pdfIn PDF document text
    • http://weraka.online/ginexumevilya9h.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/tinowaroli.pdfIn PDF document text
    • http://termometr-medikal.site/94530372635quu3x.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/ia7hcgi/spirit_halloween_in_store_coupon_2020_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/vib1iii/kafuz.pdfIn PDF document text
    • http://true-board1.club/skoda_octavia_1.4_tsi_2020_manual25io2.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/capital_markets_analyst_salary_jll.pdfIn PDF document text
    • https://cdn.sqhk.co/vujejanar/gcuihja/kuvebivejusebilegeluduban.pdfIn PDF document text
    • http://vitodibiwanezej.mypressonline.com/zoxebumalilakanoleferu.pdfIn PDF document text
    • http://jerunurijo.iblogger.org/galileo_telescope_lenses.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/73638287013.pdfIn PDF document text
    • http://xofududegotu.epizy.com/stalker_clear_sky_actor._ltx.pdfIn PDF document text
    • http://borarujedumamut.epizy.com/97829977665.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10661 5828 bytes
SHA-256: 848bd218affa72a069cfbf72382cba7c1d70d9628d6892533a0ed1bced81de73
font_01_sfnt_off00011a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A43 14220 bytes
SHA-256: b89ed6be4cc100f5892008120f1dce4a961076c9ac64bc9c5a7ac9a8104f9c6b

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