Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b59a054ec6a8b4…

MALICIOUS

PDF

87.0 KB Created: 2021-02-09 02:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 32ffa3bf619375da90682afdc0764640 SHA-1: 5760e2162649c36b91cccd3c8333c067234f836d SHA-256: 90b59a054ec6a8b45c53c88ca2b791b7809aac1921b4ace51461f8a483adbdc7
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://jottigo.ru/123?utm_term=biology+eoc+study+guide+with+practice+questions+answers PDF link annotation
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/50740a11.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/igicb7P/snow_bros_2_4_players_rom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_600dbaaa9b458.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/tebav.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/a85e296b81e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_601bfbf85e73c.pdfIn PDF document text
    • http://daating19.site/block_strike_pc_20207ugkc.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/jRNihgi/bewavujini.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/tL1FYjg/11204657651.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/8AOVp2y/20799443383.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/dovatujujikapow_renapupukiz_wenijenimu_bonepolalip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386366/normal_600216f63c981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486036/normal_5fcce42f3587b.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/aTigZqS/padinuganuwabum.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/bejideba/91162745854.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_off00010f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 5704 bytes
SHA-256: 7c865c93c768e5964642268032a5faf37405c60cceaa9139ea06885b54379c28
font_01_sfnt_off000122ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122ED 12972 bytes
SHA-256: a64eefaf65ff881cbeda985e41da610bf6b24e5d410a9eb7fea36ae1c8f8407b