Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce2827bdc1dc53f…

MALICIOUS

PDF

44.3 KB Created: 2020-10-04 17:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f91da714d4b1c432c6bac7989f2ac8e8 SHA-1: 7bdf6194effcaad57dc8bf3da6f330507dc4efe2 SHA-256: 8ce2827bdc1dc53f35d658c6ee833587a8a1c3b312ef6f12e5ea660264ef1f8b
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.
  • 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://cctraff.ru/pify?keyword=7th+grade+notes+and+homework+asb In PDF document text
    • http://sijotexun.graceforthebroken.org/uploads/1/3/2/6/132695780/vexemawepogu.pdfIn PDF document text
    • http://tapan.eng.trans-it.org/uploads/1/3/0/9/130969932/mupoxapop.pdfIn PDF document text
    • http://files.hcinets.com/uploads/1/3/1/4/131437210/vobub-poxilinas-fimogonexodug-setuwugobod.pdfIn PDF document text
    • http://files.nlcvallejo.org/uploads/1/3/0/8/130814118/lukoziru.pdfIn PDF document text
    • https://site-1042867.mozfiles.com/files/1042867/noviku.pdfIn PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/bofujojokolu.pdfIn PDF document text
    • https://site-1036767.mozfiles.com/files/1036767/guxumaxiwofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/point_lookout_fallout_3_level.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7771/7147/files/70625338302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b64351e-677d-4bf3-b441-50ccd72fd163/92315040673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164057a8-4abe-45ab-a7a7-463773022194/lorovikivemufajo.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_off0000644d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 5488 bytes
SHA-256: f262c48b2938fc038b5b0fc3572153b3628afb9115d124b735c1f5794148017f
font_01_sfnt_off000076de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DE 14956 bytes
SHA-256: 2f2a34b69ac34af417fd378706ded93cc3d3f05d15c2c0b59db653c2fb7ac3e8