Malicious PDF — malware analysis report

Static analysis result for SHA-256 80529cffe77cf19b…

MALICIOUS

PDF

77.3 KB Created: 2021-06-01 01:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c43487497badd1bfaec3c1cafe5939cc SHA-1: 8c6f34a25223d38c10c61b3ecfd8414a124ebf71 SHA-256: 80529cffe77cf19bf22b5cf7508f52d999f2bd7533383891e08ceca85d72d945
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable hosting services, indicating a link farm designed to redirect users to malicious sites. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/123?utm_term=bienes+complementarios+y+sustitutos+pdf PDF link annotation
    • https://zisawotagaxikad.weebly.com/uploads/1/3/4/4/134478332/mogolepiw_jozusuwugi.pdfIn PDF document text
    • https://tuloforukidape.weebly.com/uploads/1/3/4/7/134752744/5096687.pdfIn PDF document text
    • https://nevutero.weebly.com/uploads/1/3/4/7/134716167/minamaxoduk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_6054403587dda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_60175952b7da6.pdfIn PDF document text
    • https://sadusanolomu.weebly.com/uploads/1/3/4/6/134646393/dijelajefamed-dofoxa-zeguk-besidupa.pdfIn PDF document text
    • https://tejitopojod.weebly.com/uploads/1/3/4/7/134737109/ae43ab35af7ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489969/normal_6056438420973.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383689/normal_5fcd7d221d990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mefijunov.pbworks.com/f/download_film_comic_8_casino_king_full_movie_lk21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/026b0882-bcba-4adc-ad86-bda2a28455c4/ap_bio_lab_5_cell_respiration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfca7fe-59d5-4321-b3a3-cc37b4bd0792/11501053524.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144429135/zanussi_lindo_300_tumble_dryer_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b244725-7e85-4afb-a667-f9cf936c311d/4912765091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c432a224-98f8-4cf2-9207-d052e0025f1b/76593520996.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144429006/3235828504.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144428334/22_hp_briggs_and_stratton_intek_v_twin_engine_reviews.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/55960583302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3f6a4a-f5ba-463c-b0db-c4e4519bdebc/michel_foucault_power_knowledge_summary.pdfIn PDF document text
    • http://pevozowo.pbworks.com/f/nidur.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/sogezaxebew.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/61713725315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b6a391-ea9e-4d8b-8b80-25a7f63d6d95/how_to_install_mod_menu_gta_5_ps3_without_computer.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144428343/what_gemstones_are_found_in_washington_state.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_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 5452 bytes
SHA-256: 51e07a8ef724fca1311cb901e751ab2c89f65caefd7f344a3aabd4dfd0c230d9
font_01_sfnt_off0000fdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEF 12388 bytes
SHA-256: 78760bffcc43d9f1130f36e66c3ee67617d05ca8407550f1e58a0168ed2536d2