Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9ebe7f7356e689…

MALICIOUS

PDF

68.0 KB Created: 2021-03-04 09:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2dd2fd3cd3ae059c95ce1bf23d83f396 SHA-1: eae935a2c7cbfa4c8a8834268501557d482d068c SHA-256: 0f9ebe7f7356e6895ba662ed0d5a01d8eb463b5f0ea66a5a818ed95acdfd18c6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/award?keyword=how+do+i+connect+my+turtle+beach+elite+800+to+my+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_601b0e5376499.pdfIn PDF document text
    • http://bigonetudukori.iblogger.org/adventures_of_tintin_comics_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/ru1iftw/biztalk_mapper_visual_studio_2019.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/23122697728.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/nwibEii/13883176559.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/d03liaf/birthday_wish_meaning_in_bengali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_5fd0e3f19155c.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/ifhgibK/ben_10_up_to_speed_unlock_all_aliens.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/what_does_a_medical_malpractice_lawyer_do.pdfIn PDF document text
    • http://balifruit.com/division_worksheets_grade_4_free80qzb.pdfIn PDF document text
    • http://gomededow.22web.org/23598485109.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/whitehall_ii_study_of_british_civil_servants.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_off0000cc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC52 5764 bytes
SHA-256: 8bcafdcfcaffc54e1610075174814875b23d054da5b26d56d231c16343677082
font_01_sfnt_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 10260 bytes
SHA-256: 7618d335b12164de7c795b6f997b5fa40c2a94a790891302f81f884a7aecfd58