Malicious PDF — malware analysis report

Static analysis result for SHA-256 781b1e0824cb01b6…

MALICIOUS

PDF

65.2 KB Created: 2021-02-02 05:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e6d38758fbaf15c05755ce74a618e3d2 SHA-1: 10b0386b4c7e1684e45e629e6709770b58f6c2a2 SHA-256: 781b1e0824cb01b64c015f9f9758a7b29419400e6a468a1b772346b701bdc5ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism for malicious content. ClamAV and ML classifiers identified this as a phishing or malicious PDF. The embedded URLs likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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=anker+astro+e7+manual PDF link annotation
    • https://mezobemubuzopos.weebly.com/uploads/1/3/3/9/133997151/velajuzudajapi-luraripodu-pebojebamafozu-vizax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_5fdb85079d306.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501996/normal_5fed2d3532e96.pdfIn PDF document text
    • https://nojezedefefowas.weebly.com/uploads/1/3/4/7/134762002/152347.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408323/normal_5fe1d0642079f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5fd97a3cd85fb.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/75454828074imufr.pdfIn PDF document text
    • http://noksipals.online/38871989547nxp0i.pdfIn PDF document text
    • https://migobajiker.weebly.com/uploads/1/3/5/3/135390735/4116318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_5ff22740b86b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5fe3331e9c998.pdfIn PDF document text
    • http://antinomi.design/galanezebamdmbey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5fd0926f8c43c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393044/normal_6006983750cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492272/normal_5fd2dbdb206d2.pdfIn PDF document text
    • http://0fruit.space/8906806029211xay.pdfIn PDF document text
    • http://topvideo.design/zombie_objective_mod_apk_uptodownl63y5.pdfIn PDF document text
    • http://lastmarkt.ru/brothers_full_movie_download_filmyhit5a9hf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5feba2cb301ef.pdfIn PDF document text
    • http://matroskin.space/reset_recent_files_mact8760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495385/normal_5fd12630c35e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_60024cfc472d2.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/bypass_paywalls_firefox_androidxbet3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_600651641439c.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_off0000c263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC263 4964 bytes
SHA-256: 774f2be1537c9a4918d421ebddb8fe2da5eefffafe3826538bae4e472c2f6a52
font_01_sfnt_off0000d338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD338 10628 bytes
SHA-256: 70db86ad685f7abc239b78d5363f9fce61980e57a5f1888a0d74e119c0b7ca83

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