Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e78de67c7cc6882…

MALICIOUS

PDF

97.1 KB Created: 2021-03-10 13:25:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 054b145de688c1a964b00201c977103f SHA-1: b3346aac57cea5757f86bed9f3c68dd18197abd7 SHA-256: 4e78de67c7cc68826436ece5d4994ee9a4cb8515e198e2e7dd92ee2900ccb4fc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pelibifir.ru/award?keyword=avalon+catalina+map+pdf PDF link annotation
    • https://cdn.sqhk.co/buwaxaxodi/KijhyZG/rechargeable_table_fan_amazon.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/56735708766.pdfIn PDF document text
    • https://cdn.sqhk.co/jetuzama/UhhThdl/free_award_certificate.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuzorumuji/lijjj4c/movie_finder_application.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/1968820982.pdfIn PDF document text
    • https://cdn.sqhk.co/megodiwe/hd5igL7/smith_s_diamond_knife_sharpener_how_to_use.pdfIn PDF document text
    • https://cdn.sqhk.co/mojekuvugise/hgBKaia/31545717947.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/hhhjaic/71734396649.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/eihiinw/metaphysical_shops_near_me.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/wifi_millionaire_system.pdfIn PDF document text
    • http://putededojijubo.iblogger.org/69861470721.pdfIn PDF document text
    • http://pabukelib.66ghz.com/fabixixaxenadikisekukin.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/ihp5geQ/oklahoma_state_basketball_tickets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagisejokunego.rf.gd/black_ice_frostbear_fnaf.pdfIn PDF document text
    • http://bememikat.onlinewebshop.net/43374344374.pdfIn PDF document text
    • http://wozawexopad.epizy.com/pdf_ceros_dan_batozar_tere_liye.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/craftsman_electric_blower_vac_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/simplifying_radicals_worksheet_word_document.pdfIn PDF document text
    • http://nunevubedodunu.rf.gd/24304117152.pdfIn PDF document text
    • http://dogurof.epizy.com/bowknot_platform_flat_sandals.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/divergent_ar_test_questions_and_answers.pdfIn PDF document text
    • http://mopezit.epizy.com/roku_2_remote_not_pairing.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/nesco_fd-75a_snackmaster_pro_food_dehydrator_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/43123611415.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/confidential_information_policy_template.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/what_do_you_mean_by_value_of_education.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_off00013fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD9 5076 bytes
SHA-256: c2c0d113241d1f2c109e2ed70213f7d90e6c90c641e8caef843539a7ff460d05
font_01_sfnt_off00015119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15119 11072 bytes
SHA-256: 33bf4e49457d17188504f66e7f9c928b28ec17f38272a71c0e921f8f1cdb614a

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