Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3fa4b8535a28308…

MALICIOUS

PDF

82.9 KB Created: 2021-03-24 15:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5be602d13823560faed083dc94767802 SHA-1: 7b90e20fb50ab3d4ec0e335a480c4b39083633f5 SHA-256: e3fa4b8535a28308411a0dd618bf18f5ba9342270a2a8992db4d62fbae00774b
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains and known malicious redirectors, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=brazilian+jiu+jitsu+moves+pdf In PDF document text
    • https://cdn.sqhk.co/rabataxuvax/WJhjjgP/supotapozimesutik.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/kudaxeva_dizelokagukerub_xanoge.pdfIn PDF document text
    • https://tozusasulinun.weebly.com/uploads/1/3/4/8/134872335/c1da7422d44.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/cjb0haP/bufemudokuzesisoxomedivit.pdfIn PDF document text
    • https://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/zideju_zotafegidelesu.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/sinanunuxebe-xarutixaj-fewabobijuguza-wakubutopak.pdfIn PDF document text
    • https://cdn.sqhk.co/motuxeneb/zgg2jho/secret_of_mana_snes_cheats_codes.pdfIn PDF document text
    • https://lafowujokunoro.weebly.com/uploads/1/3/0/7/130738997/tixarizapupejevokeja.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/jdhQiav/2048_pokemon_mega_evolutions.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/ggjFgjI/wupatak.pdfIn PDF document text
    • https://wanagewuzedu.weebly.com/uploads/1/3/1/3/131383352/zelizub.pdfIn PDF document text
    • http://kigazuvunawolux.iblogger.org/468203910.pdfIn PDF document text
    • http://xinupavob.iblogger.org/35067549281.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/3052bb84-d328-46c6-8daf-eeba558bbf77/bose_solo_5_universal_remote_tv_codes.pdfIn PDF document text
    • http://fafamofuwinofen.epizy.com/ikea_home_planner_italiano.pdfIn PDF document text
    • http://raxagis.rf.gd/xakenikem.pdfIn PDF document text
    • http://tinazas.epizy.com/35407025355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/777a6805-36ec-4a19-8ff4-648a68a41cca/the_magus_1968_full_movie.pdfIn PDF document text
    • http://mikifovitop.rf.gd/72640325067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d76a7f6-581d-4062-b660-8809e1b0b15e/small_engine_mechanic_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3267d06d-ad68-4802-b5be-eae0398d4029/monsieur_ibrahim_e_i_fiori_del_corano_film_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144e5b32-1658-48e7-8a0b-77ee4a512d0c/art_in_focus_student_edition.pdfIn PDF document text
    • http://fejozimi.epizy.com/asvab_prep_book.pdfIn PDF document text
    • http://xatamiv.rf.gd/the_bet_short_story_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 5420 bytes
SHA-256: 9b58a3929ee808df10ebece7361635784284ba06bd6a6a4236d9ba9122c50642
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 11056 bytes
SHA-256: a825ebe85808ae7b01304a775aca2cb4aea68e625c3fe661738e39a2d8b0d550
font_02_sfnt_off000128b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B6 16060 bytes
SHA-256: b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c