Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca53b948c35e62ff…

MALICIOUS

PDF

67.5 KB Created: 2021-02-16 22:08:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 97025e66479787d9bc0c3b973d607998 SHA-1: 2a4d5e3eee3eef2d76035c95f5c500e2adadb43f SHA-256: ca53b948c35e62ff4541051872beaa7131dd1c20b201b323bbe456dcc8687d77
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://druttle.ru/wix?keyword=photosynthesis+labeling+worksheet PDF link annotation
    • https://cdn.sqhk.co/sirigibi/ghgjhgj/32961103315.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/RgfugdQ/ted_talks_topics.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/ibvhaI6/pocket_staff_gif.pdfIn PDF document text
    • http://malalij.iblogger.org/anpadh_ladki_biyahi_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_602a3c9667654.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/HjchjE2/rapunzel_castle_name.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_6011e1d94c849.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/cegeftE/5012788446.pdfIn PDF document text
    • http://tegogufe.22web.org/diviser_une_page_en_plusieurs_pages.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5fec74f730d87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juzatapanosuwi.rf.gd/bertec_treadmill_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/macromolecules_reading_worksheet_answer_key.pdfIn PDF document text
    • http://xipipowateselok.epizy.com/whats_the_healthiest_coffee_at_dunkin.pdfIn PDF document text
    • http://gobofitis.epizy.com/gnomoria_military_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_off0000cc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC75 5348 bytes
SHA-256: c7be308c03325cffaff47adf48890ef428b3770495c3e4657c13ed8e590dfcc3
font_01_sfnt_off0000deb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 10184 bytes
SHA-256: e61340f5963cf9acf72dbaaf82ce6072e3620d3160e8df4c428894bba5aec121