Malicious PDF — malware analysis report

Static analysis result for SHA-256 928b04db55f2d30a…

MALICIOUS

PDF

72.3 KB Created: 2021-02-17 18:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c1be69356237e716d95320541023ec87 SHA-1: 713152db0ea4dfb2d40621455148e1daa47971a3 SHA-256: 928b04db55f2d30a2e2bd35ec7ac28fef9170d1838d6310f1ee05dfb4c19a881
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=pioneer+mosfet+50wx4+aux PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fcb7b5bcb61b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5fcc1ada1357e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428043/normal_5fd82e6a31963.pdfIn PDF document text
    • http://f13x.xyz/intimate_matters_a_history_of_sexuality_in_america_third_edition73apc.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/yjcgfTG/snake_and_ladder_board_game_printable.pdfIn PDF document text
    • http://evatopshop.xyz/best_cover_letter_for_job_applicationczipj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_6026ff59e8c92.pdfIn PDF document text
    • https://ripabukufekova.weebly.com/uploads/1/3/0/7/130738984/vagexa_razunekarovubuv.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/hcGqYwp/64282402234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450038/normal_5fd5f823e8723.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/1293a779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493597/normal_600d0a5422cee.pdfIn PDF document text
    • http://mavito.online/770974111012l4k9.pdfIn PDF document text
    • http://qwertyujg.xyz/from_the_sea_game_mod_apkf0pwn.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/gidiex8/crystal_island_wyvern_eggs.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/zazurozir.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/Y99BtrX/dafenapoxabel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_602b61536b3fc.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_off0000dde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE1 5396 bytes
SHA-256: cd35a437574b4e8aa93f6b9a5eaa36617b09ed015accb79c98f49a0f593480d7
font_01_sfnt_off0000f045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF045 10500 bytes
SHA-256: 87ff4189309fe125e67805b238026590d330a6319911607c63251a746a46873f

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