Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9de89251e9df136…

MALICIOUS

PDF

73.5 KB Created: 2021-02-06 17:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 31220d29286d4914755811026976918c SHA-1: 6f530282b4b22dcce8df95a5a7d92552a02f6ba0 SHA-256: f9de89251e9df13667a5ece23ee90a97bfaa59a4dc91106b9c216c41c483b280
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wb?keyword=kindergarten%20guided%20reading%20books%20printable PDF link annotation
    • https://vabinori.weebly.com/uploads/1/3/4/3/134348027/jugub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ffe7441542c8.pdfIn PDF document text
    • https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/kesunomuvar.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/iggKkjf/free_zedge_application_ringtones.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/8T0iahV/leap_day_game_characters.pdfIn PDF document text
    • http://lodixol.22web.org/call_out_my_name_cello_sheet_music.pdfIn PDF document text
    • https://suludexa.weebly.com/uploads/1/3/5/3/135314517/nomob.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/6773520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_5fda3cd4e3469.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/dUdhfPc/fitueyes_dual_monitor_stand_riser.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bimekikup.epizy.com/85385111944.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/jisokiwipetab.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/eqtraders_brewing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/gipopojufudarivabipir.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/leditazim.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_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 5300 bytes
SHA-256: fa2c040bf8a97c4f649cbe7cb3eb22a7edb4a13da136d1956909c154be21b1ef
font_01_sfnt_off0000f66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 10232 bytes
SHA-256: 9891d126a481f7e3f93e424a070b97cf8409311fae6fcd64531eb6a66b3408b7