Malicious PDF — malware analysis report

Static analysis result for SHA-256 be35c278d4e82f54…

MALICIOUS

PDF

66.1 KB Created: 2021-03-02 21:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3b06e6283f259474a6f56d4adbb84d2c SHA-1: 90894e42377f244e2e008778b7e0730a6431b577 SHA-256: be35c278d4e82f54d156d61e7f6c7a5e9de1b48e4c7355327386d16dd5f9c755
186 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.
  • 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://ponafet.ru/award?keyword=roland+d50+manuale+italiano PDF link annotation
    • http://instasurprise.online/campbell_biology_test_bank58hg9.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/gVviehg/72652520103.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/fegoruwaleturegar.pdfIn PDF document text
    • https://boriduleloson.weebly.com/uploads/1/3/4/0/134012687/78721.pdfIn PDF document text
    • http://luchdobro.site/12162204431h8692.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/fGnyibb/offline_games_iphone_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/Ogi92hb/shark_eats_seal_off_cape_cod_beach.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/hiqidjh/lepobunezesijezotim.pdfIn PDF document text
    • https://fumixenigijulu.weebly.com/uploads/1/3/4/5/134526518/zodiras_sedajudep.pdfIn PDF document text
    • http://aydym.club/62596856020d6n9a.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/hjasLjg/naxodapoxegiraxapukiwi.pdfIn PDF document text
    • https://dokebama.weebly.com/uploads/1/3/2/6/132681336/nodajikefosinogotata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/how_to_reset_memory_on_brother_fax_machine.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_off0000c848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC848 4972 bytes
SHA-256: eda9cfc9b9e3203abb52f6b63523850abd1b47e30baf5e6639d077cec84f2b6f
font_01_sfnt_off0000d925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD925 10272 bytes
SHA-256: f743ae53716a7bb619dcb6a41c41acc587ff63385f5e449f9a79d4950e15d026