Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7f84a548471c38…

MALICIOUS

PDF

78.0 KB Created: 2021-02-28 06:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bc77cf1e30284bc84019cb8d87456e21 SHA-1: 374df7d77473fd645cc6e8079575a6e29f5b8b44 SHA-256: 5d7f84a548471c385d504fa97382d7a05ec012ac77fc1c7c5e0295553eac9bf5
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one pointing to 'xajibur.ru', suggesting a phishing or malware distribution lure. The PDF structure and embedded links are consistent with a link farm used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=keto+diet+every+day+plan PDF link annotation
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/6802545.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/5zjb0Ge/50954779389.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/why_is_my_hotpoint_tumble_dryer_not_spinning.pdfIn PDF document text
    • http://gubokiwurajot.iblogger.org/tamil_songs_starmusiq_2015.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/sony_bdp_s1500_power_cord.pdfIn PDF document text
    • https://cdn.sqhk.co/padumaxifop/2mjjFjg/samurai_stories_legends.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/50948919986.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/which_is_more_important_sun_moon_or_rising_sign.pdfIn PDF document text
    • https://zunexoxefa.weebly.com/uploads/1/3/5/3/135340588/wabedamaz_mezuged_muwiru_biteto.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/xgdqkij/az_screen_recorder_no_root_apk_free_download.pdfIn PDF document text
    • https://pefemodadiz.weebly.com/uploads/1/3/4/5/134520562/wosabadeworot.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/3gjhjgV/bus_simulator_2020_free_bus_game_mod_apk.pdfIn PDF document text
    • https://varozuwibudod.weebly.com/uploads/1/3/4/3/134327914/dokigusaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/hjggeOZ/ropuxefiguduxunemuruleg.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/31118203253.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/honeywell_rth2300b_instructions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexukaxazixaxet.epizy.com/xfinity_mobile_app_android.pdfIn PDF document text
    • http://wipedeposadav.rf.gd/25060293736.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/red_pyramid_audiobook_free.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/pefuxafadadijusatamu.pdfIn PDF document text
    • http://zonezeg.rf.gd/pezanazaxere.pdfIn PDF document text
    • http://gaposajalumawes.rf.gd/cd_baby_pro_tax_form.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_off0000f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 4904 bytes
SHA-256: 0376f086a03d1045655d2900c65c208cb7c3067008b23977bd3c75ab35612020
font_01_sfnt_off00010723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10723 10424 bytes
SHA-256: 669b6d8e7abae36eefbd3ecbf9564342940e92a65ea64a5373ecff915bb7fead

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