Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ede1d2102cb1388…

MALICIOUS

PDF

98.9 KB Created: 2021-05-03 04:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4df996bf4a89129e6f5a7bfd8f5fbd02 SHA-1: 88fcf7fff3fd3475ed5fd461ac599973bfa3d242 SHA-256: 4ede1d2102cb1388e70f6a28a5c0e49c8f40ae317f3e94a0e5e357e9f344d962
166 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, presenting a fake CAPTCHA to deceive users into executing malicious actions. The presence of numerous external URLs, many hosted on disposable domains, suggests an attempt to redirect users to malicious sites or download further payloads. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://nipisod.ru/strik?utm_term=does+h2se+have+dipole+dipole+forces PDF link annotation
    • https://vusejamujaled.weebly.com/uploads/1/3/1/4/131437056/bodiribewobaveb-mebopo-fewesedizedok-panuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449192/normal_603ad42eeb4cb.pdfIn PDF document text
    • https://memozarukun.weebly.com/uploads/1/3/4/3/134378051/tumebon-pusokoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_601ec8be6eb4b.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/hdjjmii/48416451561.pdfIn PDF document text
    • https://feruzizujuvete.weebly.com/uploads/1/3/0/7/130775768/6722789.pdfIn PDF document text
    • http://zexorusawuwurew.sportsontheweb.net/38869963731.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/vazodozewepatamon.pdfIn PDF document text
    • http://pikejofopon.mypressonline.com/ancient_egypt_history_download.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/vuxiwuparikopejaxovikobaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/LjhAEia/recipe_gingerbread_cookies_wow.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/jdShfgP/petenoval.pdfIn PDF document text
    • http://tozaworewinox.mywebcommunity.org/senirekejoriwamaxupiripu.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/lafibozedutidazefipaw.pdfIn PDF document text
    • https://peworiwuka.weebly.com/uploads/1/3/4/6/134693567/9085284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379355/normal_5fe1331a219b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_600c544e9944c.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/38a5a7976c.pdfIn PDF document text
    • https://warapado.weebly.com/uploads/1/3/1/4/131437563/7c0073d33d6e758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukokovevaz.atwebpages.com/bmlt_syllabus_2020.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/cancionero_de_rock_en_espaol_para_guitarra.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/what_if_movie_2010_trailer.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFA 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off00012a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3D 5432 bytes
SHA-256: 3f7f6dc40d7cf2ed068421971e081f8bcf1a2ebf23c984abbcd763d4ac385496
font_02_sfnt_off00013cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC2 13336 bytes
SHA-256: 24d3f7af1b9ef5d119334fdb5d412feb68d4ada5a44f797c3114a328e9d29f5b
font_03_sfnt_off0001682e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1682E 16192 bytes
SHA-256: bc53002e67aea30efb33a0bbecd25fa77c8c834ed2da0824d9d1ca1916bab784