Malicious PDF — malware analysis report

Static analysis result for SHA-256 36683dc5061ab285…

MALICIOUS

PDF

68.0 KB Created: 2021-02-20 19:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b8988c57cd9ed150253cba97e7e5c38e SHA-1: 901a0980ff389c9a3bb717a8d77f89ff46e71c65 SHA-256: 36683dc5061ab285e14f1551bd718693dfe53084d4fd3b7f1d8d364998c32456
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=elementary+geometry+for+college+students+free+pdf PDF link annotation
    • http://siondez.ru/is_mendeley_compatible_with_office_36573rqr.pdfIn PDF document text
    • http://216tilford.com/13665244914179ju.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/gdb0dhg/plants_vs_zombies_cheats_steam.pdfIn PDF document text
    • http://on-arenas.com/1001908191kgh4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_601ad8c52c261.pdfIn PDF document text
    • http://cozyplacefor.rest/bosch_brute_jackhammer_handle5ovdn.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/oil_absorbing_sheets_walgreensa7pc9.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/geidMjg/97052604396.pdfIn PDF document text
    • http://delaem-sami.online/grit_ted_talk_worksheeth4o4o.pdfIn PDF document text
    • http://obschee.xyz/gexebalo6dtf4.pdfIn PDF document text
    • http://menformula.xyz/hugo_weaving_interview_lord_of_the_ringsafc2c.pdfIn PDF document text
    • http://azalea.store/university_of_miami_bookstore_coral_gables_flq3dsp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lekezaru/loan_against_marksheet_in_patna_bihar.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/26324843397.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/death_stranding_platinum_trophy_guide.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_off0000caf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF8 5532 bytes
SHA-256: e6daa69d89df44d94eb086bd12652745559690da97d5e90b5fac25447b3b4931
font_01_sfnt_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 10948 bytes
SHA-256: d4c949b0e7e7e62e28dede9fe42f6e707e813fe080e70e65c33c462b982de188