Malicious PDF — malware analysis report

Static analysis result for SHA-256 457ca6dee49cb997…

MALICIOUS

PDF

80.4 KB Created: 2021-03-11 02:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a76c79542c2afbbfb029e71ba8a3cead SHA-1: ff759bb80c6104f991a49e72a31ff408f8da1d2b SHA-256: 457ca6dee49cb997801e14abd96ddbf46b91ab5177c234becd776e647966c2a0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to technical documentation, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xajibur.ru/wix?keyword=learning+pyspark+o%2527reilly+pdf PDF link annotation
    • http://mitatizizuje.mypressonline.com/9350016995.pdfIn PDF document text
    • https://cdn.sqhk.co/venebavor/ba201gd/harmonize_new_song.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/6ibS9vT/pyramid_run_2.pdfIn PDF document text
    • http://jakufodunod.getenjoyment.net/install_only_docker_cli_windows.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/why_is_my_amana_washer_not_starting.pdfIn PDF document text
    • http://fitnesspack.net/kidemakaxiwamanenijo8xg5b.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/jiaSQjb/79433727899.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/Ojhjihg/24593991006.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/problemas_de_aprendizaje_definicion.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/michael_vey_8th_book.pdfIn PDF document text
    • http://ompala.store/retetomavok39jmk.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/samsung_aquajet_vrt_washer_error_code_4e.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/best_sunglasses_for_sensitive_eyes_uk.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/why_does_my_thermostat_say_error.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/2t27ict/walking_robots_for_sale.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/zedofu.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/69233769859.pdfIn PDF document text
    • http://getporte.xyz/home_maintenance_checklist_excel_templateqger6.pdfIn PDF document text
    • http://larijasetejupaz.mypressonline.com/95850011777.pdfIn PDF document text
    • http://my-favshop.online/simcity_buildit_cheat_for_iosilun0.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/98766979660.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/hUgfIe7/civil_war_letters_1864.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/4bhjuc4/air_hockey_multiplayer_app.pdfIn PDF document text
    • http://summerita.fun/a2_reading_comprehension_exercises_onlinehtrex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://namepafubi.atwebpages.com/ncees_fe_results.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 5060 bytes
SHA-256: 3689edccc394c1facd6bd693b6eaee2c1b19293e91d526c7ea2c992e99b7e61a
font_01_sfnt_off00010307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10307 10104 bytes
SHA-256: bcfaa20e363b134742a84dc5087420b9a61de8af0958d0aae18528c881d5dfbc
font_02_sfnt_off000125a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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