Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21bb78839fb51ce…

MALICIOUS

PDF

76.4 KB Created: 2021-03-17 01:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1bb5c766de36fdb098c712e4a8c2f62d SHA-1: 270067c284b9e6eb54c8ceeafd24cce6df15481b SHA-256: e21bb78839fb51ceaa145a3ad6d8e489b9f0f6c77c13912b840eaf6b586f41ef
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with 'https://seumenha.ru/wix?keyword=introduction+to+forensic+anthropology+byers+pdf+download' and 'http://fusekimutoxi.sportsontheweb.net/72032022028.pdf' being suspicious. The document body, though heavily obfuscated, suggests a lure related to downloading a PDF, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/wix?keyword=introduction+to+forensic+anthropology+byers+pdf+download PDF link annotation
    • http://fusekimutoxi.sportsontheweb.net/72032022028.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/rapavinina.pdfIn PDF document text
    • http://rixanemusijod.mywebcommunity.org/25687792179.pdfIn PDF document text
    • http://woxotiwewezoba.22web.org/78315106815.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/20290883468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/solonebosop/aadat_song_ki_ringtone.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/the_exorcist_season_2_episode_6_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9bd11d-ba56-49ff-89c2-d39a648adde3/sap_hana_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/manatotibe.pdfIn PDF document text
    • http://woxikajir.myartsonline.com/267045475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836f9c37-c161-4927-aab0-df4e4b4eca65/90582238788.pdfIn PDF document text
    • http://fijetetesozaw.epizy.com/5190886886.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/descargar_musica_de_zacarias_ferreira_adios_chica_de_mi_barrio.pdfIn PDF document text
    • http://jalebuvubo.myartsonline.com/63672396861.pdfIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_d08431a9197f40ee837fc62e58ff8c21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b089eaee-5fc7-424e-9313-a895e8696a52/is_star_wars_galaxys_edge_in_california_adventure.pdfIn PDF document text
    • http://nifibomagogov.rf.gd/45757221321.pdfIn PDF document text
    • http://tulifal.onlinewebshop.net/sefopifopejemut.pdfIn PDF document text
    • http://detuzojezil.rf.gd/orbit_sprinkler_timer_manual_4_station.pdfIn PDF document text
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_0bc06d139f8c4df191a404039b7030de.pdf?index=trueIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/5736067350.pdfIn PDF document text
    • https://e62f58f7-d903-4c93-8762-c40d3961bd4a.filesusr.com/ugd/607883_e0a93b99502b4509abbca43e10bf2078.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33B 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off0000ed44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 5688 bytes
SHA-256: 4a86e476e9a2219f625adaded1d3ab078c81b1a95a36468741e3de570d6c04a9
font_02_sfnt_off000100b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 9924 bytes
SHA-256: 73daf70e6362af82b4848930660e63ac29375be6393816b8c91f0be66073da98

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