Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80321d6dc5823e5…

MALICIOUS

PDF

34.5 KB Created: 2020-11-05 16:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: c666d284e615258bfa63bf01c61313f6 SHA-1: 0b474edf6bcd5b7f3573ebd61888ed626cc0ce59 SHA-256: f80321d6dc5823e5665cf35ee5249619326ed97b3f6818f6cd2a45ceed5be515
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://traffset.ru/aws?keyword=storybook+love+chords+and+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f8908d0510da.pdfIn PDF document text
    • https://tubumafipe.weebly.com/uploads/1/3/4/4/134458357/xodonarixudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f8b0ef538fb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_5fa178b8ae123.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/fawuwuwalafadu_zivova.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/novobomapef.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/2287031.pdfIn PDF document text
    • https://xilevaxe.weebly.com/uploads/1/3/4/3/134391777/9251793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f891c2156bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_5f9b32fb6834b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/38cb35a0-e0f0-48eb-9bd5-2e0131efe101/rojin.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/77463012676.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/david_cook_always_be_my_baby.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_off000046dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46DD 5496 bytes
SHA-256: a41305c44ea7e663c7907e7a1da94dd6ed220b01312527aed19216803107f6a5
font_01_sfnt_off00005990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5990 10600 bytes
SHA-256: c993acd41bbd7ea37649f2f5d3f0d2eb54dacaaeb3d0c93918869e762d0ae185