Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e22f0c59d9701be…

MALICIOUS

PDF

71.0 KB Created: 2021-04-21 03:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b687c6ced94dfc7b12ff5f5541cbd550 SHA-1: 7771f70fe5bb037d431f82daccf2b2c161d650a1 SHA-256: 9e22f0c59d9701bee1a7b7e92240ca4112dfb960f061eb735bc287915378a87d
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards a phishing or malicious redirection scheme, likely aiming to lead the user to a compromised site.

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://zajinet.ru/strik?utm_term=calories+taco+bell+bean+burrito+fresco+style PDF link annotation
    • http://wunadimizurened.medianewsonline.com/sust_admission_question_2020_19.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/1997_ford_explorer_maintenance_schedule.pdfIn PDF document text
    • http://waxedeb.getenjoyment.net/bradley_round_sink_parts_diagram.pdfIn PDF document text
    • http://lareluso.iblogger.org/soccer_drills_for_4_year_olds_free.pdfIn PDF document text
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/2650224.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/b_d_chaurasia_human_anatomy_7th_edition.pdfIn PDF document text
    • http://fibilif.iblogger.org/gevedopazugo.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/c0b00650b5c.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/what_book_comes_after_omen_of_the_stars.pdfIn PDF document text
    • http://zebisol.mypressonline.com/plantronics_voyager_5200_uc_pairing_mode.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/najazexa.pdfIn PDF document text
    • http://xanevejesofag.mygamesonline.org/kikigoja.pdfIn PDF document text
    • https://vajipexinonadol.weebly.com/uploads/1/3/4/0/134096003/mifitagu.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/libro_berenice_edgar_allan_poe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuminexozuvino.atwebpages.com/inside_the_afrikaner_broederbond.pdfIn PDF document text
    • http://dipumekamerara.rf.gd/my_favorite_things_ariana_grande_youtube.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/editable_bingo_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c188249a-a868-458c-b923-7c9c696a48f3/jepasifinaru.pdfIn PDF document text
    • http://mipagolawalixa.onlinewebshop.net/70100545895.pdfIn PDF document text
    • http://teluroluxeterez.myartsonline.com/how_to_be_public_relations_and_fundraising_manager.pdfIn PDF document text
    • http://pexofapu.myartsonline.com/pdf_ebook_reader_online.pdfIn PDF document text
    • http://zugagib.atwebpages.com/questionnaire_on_retail_banking_services.pdfIn PDF document text
    • http://puxagere.epizy.com/windows_7_install_step_by_step_usb_pen_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c3063a-381f-4fed-aea2-5e35f5aa6184/fepuroxivemutovamigese.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_off0000d9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A7 5020 bytes
SHA-256: 93d2397c4ebf821e0fdfed51c8042b6b454af7bdd76ff5a4a97fe515ddd291a7
font_01_sfnt_off0000eacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACF 10308 bytes
SHA-256: 6e7529cbb1424939a7c5c4050a8ac3a7f12c45c69957de3f35653fd2b52d11aa

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