Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2ffe9473b58d07…

MALICIOUS

PDF

76.1 KB Created: 2021-03-17 10:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 851c40850ac5a715016c79608a470110 SHA-1: 389635f87917ae71039bc8ac19c925958bf80b6f SHA-256: 4f2ffe9473b58d0792499d1219185b35799dd3c193f58aaaebd6b5a356b6703a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and one prominent URL related to suicide helplines which is likely a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's structure is designed to host many links on potentially untrusted domains, suggesting a malicious intent to redirect users to harmful content or phishing 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://gimoguvi.ru/strik?utm_term=who+is+most+likely+suicidal+and+should+seek+help PDF link annotation
    • http://jisetatiloro.scienceontheweb.net/mafopawopumalokegojanejek.pdfIn PDF document text
    • http://tersq.space/what_are_the_responsibilities_of_a_program_coordinatorob2rx.pdfIn PDF document text
    • https://balalowomave.weebly.com/uploads/1/3/0/7/130738893/notufoxigivejen_sukoxusivufurat_kabulatirudiwu_valadejuwe.pdfIn PDF document text
    • https://regapopuro.weebly.com/uploads/1/3/5/9/135964604/2618931.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/nuevo_lenguaje_musical_3_ediciones_si_bemol.pdfIn PDF document text
    • http://freefire-gifts.com/44673625682dmazn.pdfIn PDF document text
    • https://gajebafanagifim.weebly.com/uploads/1/3/2/8/132815836/zuxewosabene-sumogawi.pdfIn PDF document text
    • http://itawegan.fun/megohmmeter_user_manualspyp4.pdfIn PDF document text
    • http://prizinsta365.site/sadesalejisojexezos3h9du.pdfIn PDF document text
    • http://zudepogumo.medianewsonline.com/why_is_my_bluetooth_dongle_not_working.pdfIn PDF document text
    • http://lotsmen.com/pixovolibilotomozeresebpxw62.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/juzudopoku_napavaxos_bovanizopafe_jisef.pdfIn PDF document text
    • https://gepogujewo.weebly.com/uploads/1/3/1/3/131382217/vifujuwivokuseb-gidarinisub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotujemun.rf.gd/car_driving_game_for_laptop.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/pamudativemazubu.pdfIn PDF document text
    • http://jokipuzovorije.epizy.com/oscilloscope_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/citi_premiermiles_priority_pass_application_form.pdfIn PDF document text
    • http://lapabogi.rf.gd/biodiesel_from_microalgae_beats_bioethanol.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/wings_of_fire_book_4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/catalogue_des_cameras_de_surveillance.pdfIn PDF document text
    • http://wefofumerari.rf.gd/metformin_dose_too_high.pdfIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_3b6f6fc2014142adbae23d19fde42c11.pdf?index=trueIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_850cc0e863d84ab08e65bb6bf4caf9a8.pdf?index=trueIn PDF document text
    • http://wadoromutisagar.myartsonline.com/75362936748.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_off0000ec90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 5396 bytes
SHA-256: f1d41a3445093f98c86f8c8065cbf311066b12926ce4eeb58de0ebbb9cae36a3
font_01_sfnt_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 10532 bytes
SHA-256: 4760f478052fd52f8f9f52ce099bfe38e9de5025f71cba580647b699ee0bb1cf