Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ece6293a09be81…

MALICIOUS

PDF

78.7 KB Created: 2021-03-28 18:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a4335c3c20fa9f756e783ea1893e079e SHA-1: 128eddcdc8e430b74a1bd18ec5b709ba2c965997 SHA-256: 20ece6293a09be816d302cbdff55e585e4f65d0e78c5ca6b5b228871751bfad9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://lozipotod.ru/strik?utm_term=oscar+and+the+lady+in+pink+pdf+letter+4 PDF link annotation
    • https://cdn.sqhk.co/xeloxilava/bY2D3tg/molijobute.pdfIn PDF document text
    • http://frontglass.xyz/relorixefdd0n.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/jjdthd7/65017318150.pdfIn PDF document text
    • http://irisca.online/what_are_good_books_for_3rd_gradersqx1f8.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/iiijgjg/pes_2008_ds_rom_espanol.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/black_roots_science_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/aheKMgi/chicken_invaders_5_multiplayer_edition_download.pdfIn PDF document text
    • http://magic-spring.com/how_to_connect_dvr_to_directv_appy0soc.pdfIn PDF document text
    • http://xixofafil.medianewsonline.com/proceso_de_investigacion_documental.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/how_to_do_a_proof_of_service_by_mail.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8098ffcf-5632-4198-aa69-11f8d06118de/bigger_leaner_stronger_free_audiobook.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_48cf84ad93834606aaad0596437c8ad7.pdf?index=trueIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_09c26360cb154d4688812d62b97b36f6.pdf?index=trueIn PDF document text
    • http://kivarutumo.myartsonline.com/modul_belajar_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/how_many_stephen_king_novels_have_been_turned_into_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffac1fbf-d1f2-4916-85e9-94c1c4c5de58/juxinususipusopudumolog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc928e5c-9276-405b-b281-4d599ddbc3da/89437796870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c48061-79db-4934-900c-fc201bde0901/worufawojos.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/fender_frontman_15g_amplifier.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/computer_high_level_programming_languages_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c86552e-0b47-444a-8dbe-0d51ae2bf936/neson.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_off0000f67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67B 5524 bytes
SHA-256: 9f4da294d61a6a034047af45a8ac84079ef00630f109131503daf67cfacaedb1
font_01_sfnt_off00010949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10949 10672 bytes
SHA-256: 3815691a439e751ebc322dd47f766cd1051347e4f80c3b272ae5ab8537aaece0

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