Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cafae7255b0f894…

MALICIOUS

PDF

139.0 KB Created: 2021-03-17 23:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33f9328041ae218ee1410221bfa9e415 SHA-1: 819d81415413c0394853812a3c80ef742f788acd SHA-256: 7cafae7255b0f894814e85d21a572175ec323cd89401bcf4ead781465a571995
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 0.9931

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://kuzutuzo.ru/strik?utm_term=cazadores+de+sombras+origenes+frases PDF link annotation
    • http://vitolebizojigok.22web.org/movewisem.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/kpFGgdE/kingdom_new_lands.pdfIn PDF document text
    • https://bubigijezifaju.weebly.com/uploads/1/3/1/3/131380429/fixatijasana-vimopojizidoxil-vafiso-masedo.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/Ghd7jd3/80321979360.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/6uYAkgd/isro_rocket_launch_today_countdown.pdfIn PDF document text
    • https://sutomoloxoxe.weebly.com/uploads/1/3/5/9/135986515/2924141.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/baefba49b.pdfIn PDF document text
    • http://winwites.space/275423952125o0nt.pdfIn PDF document text
    • http://zowomojagobipur.iblogger.org/lagobo.pdfIn PDF document text
    • https://cdn.sqhk.co/vumulevezuf/6uhgfOz/7735104429.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/vLieUIJ/28951804230.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/8244746.pdfIn PDF document text
    • http://55571.ru/perceiving_the_arts_11th_edition8jdtj.pdfIn PDF document text
    • https://sonoxezepokamev.weebly.com/uploads/1/3/3/9/133999938/3274077.pdfIn PDF document text
    • http://custits.space/dibupegauvkxr.pdfIn PDF document text
    • http://jotelefaxomawut.22web.org/number_of_american_bases_in_germany.pdfIn PDF document text
    • http://rmk4sale.xyz/functional_programming_in_python_oreillypiwft.pdfIn PDF document text
    • http://goodsfor.life/sperm_wars_game_rules6i9af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rekabalukog.rf.gd/how_to_clean_burnt_on_food_from_gas_stove_top.pdfIn PDF document text
    • http://pilujuzaxerek.rf.gd/d_d_5e_baby_bestiary.pdfIn PDF document text
    • http://podekorutad.rf.gd/task_scheduler_error_0x35.pdfIn PDF document text
    • http://jotoxen.epizy.com/how_to_loosen_a_ratchet_tie_down_strap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d8e418-bd76-4f9d-a565-64e85b30fd69/how_to_unmute_sennheiser_ew_100_g3_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008dd263-6f8d-49b3-8f61-665f1c203769/fariral.pdfIn PDF document text
    • http://naxilolebepup.epizy.com/sujagomilavapogazirimog.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001afac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFAC 6768 bytes
SHA-256: ee732aafab4f54a1ffc34b43d4487a22502665f194531e3f8697cdcff73ed791
font_01_sfnt_off0001bfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFCF 5292 bytes
SHA-256: 2d841ec39372da6500ab6cb8475a833c87eed3a370f4beca8b8cbffb41d9f8cf
font_02_sfnt_off0001d1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1B4 1608 bytes
SHA-256: 505785a6bd6859b1755384df6dfaba7fe9b1c211c39ea64bff23942fdd485763
font_03_sfnt_off0001d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9D1 13504 bytes
SHA-256: a4c8371ba2519ddac970aaac994a89b5fa8f837c87b57e05aee85803618c3851
font_04_sfnt_off0002052c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2052C 16324 bytes
SHA-256: 90f9ccbd4afd404212df792fd14b809ac331bfe0c5f2e4518cb82481acff0e2a