Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f3597022d4c43e…

MALICIOUS

PDF

71.7 KB Created: 2021-04-08 23:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a904f1a17ce3e00797737910fd8198d6 SHA-1: 54bc463ede9001fb9b558312e363c49646a159b9 SHA-256: 26f3597022d4c43e90a2e28e436b03445efe2f6a3ecf02ee20510eb4d8cd3de7
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 0.9996

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=bose+wave+music+system+iv+manual PDF link annotation
    • https://turabevov.weebly.com/uploads/1/3/0/9/130968962/wogoxofiwokaxakit.pdfIn PDF document text
    • http://potenciy.xyz/16784000883jvkm4.pdfIn PDF document text
    • http://all-casino.xyz/chess_board_picturedglga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_6060877c8fc12.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/uhaPgjX/fire_alarm_testing_report_format.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/gfWKhbI/free_kick_soccer_world_champion.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/what_do_i_need_to_study_for_real_estate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_6022da3aac8bd.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/hhGs1wD/8838829013.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://fefejixoloxit.weebly.com/uploads/1/3/0/9/130969032/ef09b845.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416935/normal_5fcf8339ad3d4.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/system_analysis_tools.pdfIn PDF document text
    • http://hr-insider.com/dotevixofet76fr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456984/normal_5ffb39858e31f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_6029e3e2175fa.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/ji5Zif9/kaxulubikomixukibipuwiwe.pdfIn PDF document text
    • http://creamwalls.online/rock_band_4_ps4_controller_compatibilityqbq4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_60124f0742121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_60421dae3a2e5.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/will_a_zit_go_away_without_popping_it.pdfIn PDF document text
    • http://widaluvawigomum.scienceontheweb.net/cabra_cabriola_turma_da_monica.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 5152 bytes
SHA-256: 6ce6097a62ffd08fe7d87e7762768ad25ae42d0660cf84eb9e65783a2c1f26fc
font_01_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 10264 bytes
SHA-256: 4c8ccb65926f90ad325bbe6e15399a838771d9de1abaadf7fde760ef5d4c8659

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