Malicious PDF — malware analysis report

Static analysis result for SHA-256 66298e8d8445973c…

MALICIOUS

PDF

70.3 KB Created: 2021-02-27 21:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3626dce0e905c262e6c634b2e4ce207e SHA-1: 86b32ef9a1edad98e5a2287b42c03a23dc75b2d2 SHA-256: 66298e8d8445973c24e8eee13996ca3815dae57458203ddc4d40659731a425d2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('ponafet.ru') and including a search term related to a product. This suggests a phishing or malware distribution attempt, leveraging a lure related to product searches. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious content.

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/strik?utm_term=insignia+stereo+receiver+ns-str514+remote PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fc9e0fa42af7.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/80087351876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448724/normal_6024f20d8d399.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/6xBNs2n/portal_quest_patch.pdfIn PDF document text
    • http://rusakova.space/on_the_road_again_gif_shrekfczfs.pdfIn PDF document text
    • http://zelopaqq.xyz/gavafugiwetapubaritukia70dz.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_integrate_software.pdfIn PDF document text
    • http://begipeg.iblogger.org/parojidaruzetazuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421208/normal_5ff7ad396315f.pdfIn PDF document text
    • http://gesemalisezusa.iblogger.org/76041285403.pdfIn PDF document text
    • http://shoop-ft.ru/visualization_modeling_and_graphics23x60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_60324d76f0009.pdfIn PDF document text
    • https://cdn.sqhk.co/zudipoje/hejzk1X/31317527850.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevejonitu.onlinewebshop.net/elgato_hd60_s_capture_card_setup.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/dasej.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_off0000d1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A4 5380 bytes
SHA-256: 7fc4e4c76016d49a1717b0f15fb49cb80db20cd301853b1c31ed735699d1db90
font_01_sfnt_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 11380 bytes
SHA-256: eb7ba1fd64c27781bef8a452002417d1a1abd99e1aadb7a838bdd3ddb4125c7c

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