Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f72c485c3265534…

MALICIOUS

PDF

76.2 KB Created: 2021-03-12 12:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 118a572d182288925c9af7cd11826352 SHA-1: e00d41b894b98fc76a29160d70b38c08528ca56c SHA-256: 0f72c485c326553463eb819c19321e79af0f821c2314929cc2250a603473da0c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'worksheet' and 'country and nationality', likely a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/123?utm_term=country+and+nationality+worksheet PDF link annotation
    • http://sberbank.services/rifesawopi8wgk5.pdfIn PDF document text
    • http://5gusevshop.space/vidinesuwakivopifadopib1qnl.pdfIn PDF document text
    • http://itayoga.space/pink_panther_trombone_sheet_music_freec9q3q.pdfIn PDF document text
    • http://baxutuji.22web.org/casio_wr20bar_change_time.pdfIn PDF document text
    • http://proita.fun/753159903420yyie.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/xudurevuko70gtp.pdfIn PDF document text
    • http://gokutep.22web.org/ruzemura.pdfIn PDF document text
    • http://sunipemumax.66ghz.com/milopefapotumos.pdfIn PDF document text
    • http://degitowexara.iblogger.org/vinabepusojofotanareb.pdfIn PDF document text
    • http://mishabelle.ru/norton_anthology_of_american_literature_8th_edition7f9u7.pdfIn PDF document text
    • http://unityfree.xyz/altar_server_training_pptl7vu3.pdfIn PDF document text
    • http://xisubov.iblogger.org/garmin_62s_price.pdfIn PDF document text
    • http://nuveclovet.xyz/what_is_fundamental_theorem_of_calculus_part_14qqgc.pdfIn PDF document text
    • http://shoop-ft.ru/zedge_app_ringtonelznp6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boragilaz.rf.gd/movetanupobanonumuruz.pdfIn PDF document text
    • http://mefinuxewo.epizy.com/balance_sheet_equation_uk.pdfIn PDF document text
    • http://noxudabewoxedit.rf.gd/chick_fil_a_team_manager_salary.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_47acd0c22c71456da5fb5d26549fa8c6.pdf?index=trueIn PDF document text
    • http://fepaxediv.rf.gd/27692492005.pdfIn PDF document text
    • http://fonumorawupako.epizy.com/chm_reader_mac.pdfIn PDF document text
    • http://gukasitaxe.epizy.com/luzaregan.pdfIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_672ccea94be34905afe3d61ccddb30b0.pdf?index=trueIn PDF document text
    • http://xotujulenibol.epizy.com/vitafi.pdfIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_7fe1b0fd38c54d5b9a4aa74129b9548a.pdf?index=trueIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_e9266428d9914ee09d7788881ca1eca9.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

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_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 5076 bytes
SHA-256: 50f9cf0b4afa2a0fb9d1e60ea1f29b19a3ca7436a714c623616a476edbaf0361
font_01_sfnt_off0000fc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 10844 bytes
SHA-256: e67497bd413a8fbd44a9c9f35548cdccee0b59b8eda7c629d910042f3c84938f

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