Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf94fde933996ed…

MALICIOUS

PDF

78.0 KB Created: 2021-03-12 14:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c0c6fc1b417982df486fe9f3a132ec23 SHA-1: 3a7acef4320080ca93915e484c15167ad5f0a362 SHA-256: eaf94fde933996edc007d046e302fb711e2d2e9b6446ae3c447991c6d4102a48
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=business+environment+book+pdf+download PDF link annotation
    • http://gdztut.com/run_on_sentence_practice_4th_grade9nhrl.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/UdXhzLm/plague_inc_evolved_the_fake_news_trainer.pdfIn PDF document text
    • https://cdn.sqhk.co/bodevoposuji/cSyhBha/launch_fcu_account_number.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/AYrihgh/how_to_draw_cartoon_animals_book.pdfIn PDF document text
    • http://nasty666.space/what_star_wars_book_should_i_read_after_the_thrawn_trilogyanol0.pdfIn PDF document text
    • http://shothard.site/accrued_expenses_balance_sheet_deutsch1zeei.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/hajgibr/learn_python_full_course_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/gubusase/gibiae4/paradise_hay_farm_island_offline_game.pdfIn PDF document text
    • http://1fps.ru/368493268829xsyv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6fcf557f-b9e6-494a-9ee3-56bd08a765e9/health_and_safety_executive_london_phone_number.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/42745163771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1683da2-58b5-4abe-a427-ad323feee929/navy_seals_training_facility_san_diego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c264fbaf-b52d-4638-8cf7-927a29245bf6/what_is_the_best_powder_scale_for_reloading.pdfIn PDF document text
    • http://pizenusogusu.atwebpages.com/31224217130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bd2e756-6ed8-452f-80cc-dbc120fd6731/98384124322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437e5581-25c0-4579-8802-d2c30cf45feb/energizer_xbox_one_controller_charger_with_rechargeable_battery_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b5387c-2aed-47c9-b8b3-7cd07ddcb1fb/1480349917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4fe40b-1ec3-40ae-a7f2-bb5083c01fa8/carlos_bulosan_america_is_in_the_heart_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31549f9b-efdd-476d-95ba-5d6c7a0d06d5/kedukapinifilazuvenaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e277ad-ae82-43ed-b7f3-082e4e9c68d2/how_to_make_a_toga_out_of_fabric.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE785 5472 bytes
SHA-256: 2906cc84775a024007d74c4ec8acc99d6b5c75e6b4f47a1282dc862e6c70d6a7
font_01_sfnt_off0000fa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 10128 bytes
SHA-256: 6e312c08270c8c99ef445992ba2602e99b1c4e32a9f64d6e37431288cd7a2c7b
font_02_sfnt_off00011cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2