Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8af0ff6316851f3…

MALICIOUS

PDF

42.6 KB Created: 2020-11-08 18:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 23185afe1df75dafec6a5037efbbf956 SHA-1: d7f5b16e76413c45717a0287fd3dd115d50ed720 SHA-256: d8af0ff6316851f3db5a8905ca307c761b255f1f9cd37a50548fe4fb393ecbb4
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffi.ru/123?keyword=fishy+on+me+roblox+id+full+song PDF link annotation
    • https://nubenitenaw.weebly.com/uploads/1/3/4/0/134016689/cf08f02b45c4.pdfIn PDF document text
    • https://jurosoke.weebly.com/uploads/1/3/4/5/134529251/5055111.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://xutomanuvafara.weebly.com/uploads/1/3/4/3/134345830/9e41364e.pdfIn PDF document text
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/xibineguweri-kevolevi.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/7015ce783f7.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/favivulorevuji.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/2146136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f94595b8e74b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rarokazuj.files.wordpress.com/2020/11/gawumakewo.pdfIn PDF document text
    • https://jurimewuva.files.wordpress.com/2020/11/91777551244.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_off000065ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 5376 bytes
SHA-256: e74ae2350a8bbd6105b0e44f3c07fcffc98bde3da1c6ee311d2c874ee348b551
font_01_sfnt_off000077f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 11560 bytes
SHA-256: 7107d1306fe1740d58a8791fd6b463ee83f0527efe37cc38c0e4004ac364e969