Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fee6fa4df8d655b…

MALICIOUS

PDF

53.0 KB Created: 2020-11-09 16:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 951001841ddd778ca76589921cb42385 SHA-1: 1d312e31c488fce2eee55524f49a07b4e75adb7e SHA-256: 7fee6fa4df8d655b4ec403e5acb324a9b20b70527ed1011cd952334c36c485dd
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?keyword=chapter+10+ap+biology+study+guide+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5f8da525c2197.pdfIn PDF document text
    • https://tivurenufetoza.weebly.com/uploads/1/3/4/2/134235987/rabepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f9bf0076293b.pdfIn PDF document text
    • https://nugekepujipa.weebly.com/uploads/1/3/4/3/134318644/pizafabipuda-kuzakamiraguri-rajadawurug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f8fcad08dc61.pdfIn PDF document text
    • https://memumozevevu.weebly.com/uploads/1/3/4/3/134378747/4657720.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/1855918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f9d2808b4e58.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_5fa0e3d05ae4b.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/gabemomigipenaguv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wibedubosateg/chu_ko_nu_civ_5.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/run_4_vevo.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/oneida_eagle_bows_outlet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C8 5656 bytes
SHA-256: 7303a21d2690426ce76e70a6010339db42ab54c200c053b98de05a6ead8f7a4a
font_01_sfnt_off00009518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9518 10572 bytes
SHA-256: 6af01c05ed76384b8959d6d3a38e0a1ba6a335cf0f01bf5e0f2953e7daea335f
font_02_sfnt_off0000b906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB906 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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