Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad81ffd573ed35f…

MALICIOUS

PDF

68.9 KB Created: 2021-02-24 01:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f6317909a478e15c6f407a15c910aaaf SHA-1: 0a5797ef1946706bd8fa03e92b8f0a29ebed645c SHA-256: 2ad81ffd573ed35f8a56315f3573606de0a8e8d7a3370ceb4286e38843c2ae19
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=365+bedtime+stories+pdf PDF link annotation
    • https://cdn.sqhk.co/zurefaxenov/hpjfjfO/golen.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/Kbgh9jf/trafic_tours_cancun_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/aidgdgc/6346158000.pdfIn PDF document text
    • http://dektesheff.xyz/88054571961c9nrm.pdfIn PDF document text
    • http://gogotmif.space/hit_em_with_the_woahkmg0x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5fefc616a4b5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_600f1cc0a616f.pdfIn PDF document text
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/c0bb28f1fa5c85.pdfIn PDF document text
    • http://wowit.pro/liverpool_football_club_news_nowerj0n.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/kFFBBjj/pinball_arcade_museum_st_petersburg_florida.pdfIn PDF document text
    • http://universe1.space/my_hp_envy_4500_printer_will_not_printkpfy7.pdfIn PDF document text
    • https://jiwuzutobaduf.weebly.com/uploads/1/3/4/8/134889186/subakopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beluguliwiwe.epizy.com/remove_blank_pages_from_adobe_pro.pdfIn PDF document text
    • http://gajubadizoduj.epizy.com/saucony_guide_iso.pdfIn PDF document text
    • http://kozirexufogepi.epizy.com/bphc_uds_manual.pdfIn PDF document text
    • http://kesuleruvepo.rf.gd/31530644236.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_off0000c75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75D 5432 bytes
SHA-256: 1f83f75fd7583abc18f0b032b26d85713523103337e36097a8f51cedfc5aac3f
font_01_sfnt_off0000d9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B7 13896 bytes
SHA-256: 7882926d5be583fbc2d4de07d1e831cf9add916910d35acde7998575c2d17a71