Malicious PDF — malware analysis report

Static analysis result for SHA-256 273f16ed5df13fab…

MALICIOUS

PDF

72.7 KB Created: 2021-02-28 00:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 739ac3754f838e2bd03b0fdc7476e43f SHA-1: 9672ae17c99bd26f782cfb4649a846cfe8a61f49 SHA-256: 273f16ed5df13fab92e70ffd0c6f7d81deef3df9b114a60c718a87572b337582
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://botokaw.ru/award?keyword=the+nag+hammadi+scriptures+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5fcf375724df6.pdfIn PDF document text
    • https://rijagadufe.weebly.com/uploads/1/3/1/6/131606992/2021905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_5fd65d130049d.pdfIn PDF document text
    • http://eduha.online/cisco_webex_room_kit_installation_guide_english2vk1n.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/zen_and_the_art_of_archery_audiobookw1hu2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_601c648c54fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_601746389910e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_602ad380e355d.pdfIn PDF document text
    • http://service-hire.com/47087493563018dg.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/7kgiFEO/new_bad_neighbors_2_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/pgcLejb/aarons_payment_login.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/golatukigomerusila.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464330/normal_5fedfa2d25b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_6036cc1a65ce9.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_off0000e121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE121 5488 bytes
SHA-256: d62f6fde1c63c09c34a5849d1d98152f2c339a19541bc35df7da2c8bf9ac5223
font_01_sfnt_off0000f3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 10000 bytes
SHA-256: 35a439863ee9784f648b9df45c6c1bddc5af34a6aeb0b225c9555eec85982e85