Malicious PDF — malware analysis report

Static analysis result for SHA-256 16eb7c4da557534a…

MALICIOUS

PDF

70.4 KB Created: 2021-02-24 23:48:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7fe9a588aec3d88c8f4ab435de10a14b SHA-1: ecd215455c9c5c37e6d62cb08d4188efc38fccb8 SHA-256: 16eb7c4da557534a40b1a2a0b76347ca2916c9558e71a0994b2f40fb09335502
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://leonvi.ru/award?keyword=how+does+yeast+infection+affect+a+woman PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402481/normal_5ff1270eb6873.pdfIn PDF document text
    • http://tamakar.xyz/what_are_the_best_black_friday_deals_at_walmartt7osx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467287/normal_600901997fd39.pdfIn PDF document text
    • http://feelslike35.com/how_to_use_poll_everywhere_in_keynoteoi64l.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/gfXjbhd/rirusujijexanafarote.pdfIn PDF document text
    • http://espaceabonne.com/jasugasomobedzfhj.pdfIn PDF document text
    • http://gedawirij.66ghz.com/jeans_size_guide_zara.pdfIn PDF document text
    • http://shoop-fe.ru/cissp_study_guide_shon_harris_free_download37psj.pdfIn PDF document text
    • http://temilops.xyz/kisutotarubep5m50.pdfIn PDF document text
    • http://idealica-italiauficiale.website/dichotomous_key_worksheetxxvl6.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_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 5196 bytes
SHA-256: 4313ebc836005b232a978109e8d138b36ce27b25e2d73f069cd57dfc17a5b715
font_01_sfnt_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 9560 bytes
SHA-256: 305a1cbd6b208eb2bef462d8e7b35779a5e3460bbe25e58245d0efaa3c8eb396