Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea29e5c00ccbba0…

MALICIOUS

PDF

85.1 KB Created: 2021-04-22 22:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3974d1282f26384d62e0d25492097d9b SHA-1: 70ecaeeb1763eb6145f0ca16d2b1d5f4c5f441cd SHA-256: 7ea29e5c00ccbba078057c47df7eb2e25f2c2221584fa27aa8a2a7c33dfe4aae
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a common tactic for credential theft or malware delivery. The presence of numerous external URIs, including one pointing to 'midufefew.ru', suggests potential C2 communication or payload hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://midufefew.ru/strik?utm_term=ridgid+miter+saw+stand+ac9944+parts PDF link annotation
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/a938a31347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_600e9beaf1905.pdfIn PDF document text
    • http://zoom-omsk.ru/tosufixazapjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_601fb194b869c.pdfIn PDF document text
    • http://pamesiso.22web.org/40442558283.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5fdefb610d15a.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/dungeons_and_dragons_fillable_character_sheet.pdfIn PDF document text
    • https://zoxukumej.weebly.com/uploads/1/3/4/3/134327216/guvuvasa_wisekoxexoli_sazowibikevota.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/13406656753.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/5jhcghY/gps_tracker_mobile_number_online.pdfIn PDF document text
    • http://topsalon.xyz/d-link_dir-615_problemsl1psx.pdfIn PDF document text
    • https://sovufejado.weebly.com/uploads/1/3/0/7/130740048/eb19128cec7.pdfIn PDF document text
    • http://munupozazuwo.iblogger.org/lower_back_stretches.pdfIn PDF document text
    • http://damvglaz6.xyz/2943050764774pug.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/26031353203.pdfIn PDF document text
    • https://torejijifixoni.weebly.com/uploads/1/3/5/3/135335296/kunasomajikidawuxa.pdfIn PDF document text
    • http://groshyk.site/lolusewoxupb2tik.pdfIn PDF document text
    • http://zavodtriumf.com/bujijq9eea.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/aapjdgd/monster_trucks_heroes_wiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_5fc72a6ee5076.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bakalawakajade.epizy.com/24600638971.pdfIn PDF document text
    • http://netifikapiwi.epizy.com/pipoke.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_off00010d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D70 5704 bytes
SHA-256: 66dbeb545b5e331efc678ae44a8b8d07c25e77a0a50bdab0c9d68764340bb4ae
font_01_sfnt_off000120e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E4 11228 bytes
SHA-256: 084b869656a76c91ba987d3e27499c1254420a87182581b491c786a99d7098fc

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