Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a07481b7b3d51d…

MALICIOUS

PDF

74.9 KB Created: 2021-03-04 21:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 719c4d757f76ab9155beadb2a1d386da SHA-1: 2c0840700aa8e833f93f88981a67d877d5226c1d SHA-256: 22a07481b7b3d51d9d1c777ebfd1c5daefb413ee7d41699dfe37da3a3700bcd5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute malware. The presence of 'utm_term=asus+p8z77-v+pro+bios+update' in one of the URLs indicates a lure to trick users into downloading a fake BIOS update.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=asus+p8z77-v+pro+bios+update PDF link annotation
    • https://cdn.sqhk.co/dezosanag/EjhloHo/woluleta.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/hj3BTid/color_pattern_fill_illustrator.pdfIn PDF document text
    • https://cdn.sqhk.co/zakoduba/dXnwibf/jujanebulituzodeb.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/gjibLic/niwifebubotad.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/LuhifpM/power_rangers_legacy_wars_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/idgcgcD/33327632842.pdfIn PDF document text
    • http://titofiz.22web.org/elaborate_report_traduccion.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/icwjhji/zemomiponeta.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/pumivosaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/ZnoyzHt/chicken_run_windham_ny_car_show.pdfIn PDF document text
    • http://xajoraxi.22web.org/delekunuxusox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiporiri.rf.gd/59552891397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6c3240-b6af-4379-a8cc-64d44e485e86/how_long_does_the_dyson_v6_battery_take_to_charge.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/45113144069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81408df1-849c-4ad7-b0b4-24899eb76191/the_ninth_wave_painting_original.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/mamovinif.pdfIn PDF document text
    • http://sijeviveb.epizy.com/43705325088.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/uppababy_vista_double_stroller_sale.pdfIn PDF document text
    • http://kesopepi.rf.gd/54238272939.pdfIn PDF document text
    • http://xupewurabef.epizy.com/67726710248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7166b254-9821-4650-943b-543e67411907/how_to_program_a_sony_dvd_remote_rmt-d197a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6604a84-0365-4188-8e3e-0cf57afb2030/verbos_regulares_espaol_ejercicios.pdfIn PDF document text
    • http://wabifitas.epizy.com/speech_therapy_lesson_plans_for_middle_school.pdfIn PDF document text
    • http://gakupoxefale.epizy.com/13519129438.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_off0000e596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 5464 bytes
SHA-256: 2c12abcb5e2b14260fd45d1466dcdefec75eb5e1354e8a14359a85d86cf034b8
font_01_sfnt_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 11048 bytes
SHA-256: 940b010a56a5200e7ecdb55fa5894de7d01d694a15a30c015200179d98167704

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