Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f0115caa6ee9b8…

MALICIOUS

PDF

61.1 KB Created: 2020-11-09 11:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 4a07f1258c633b186e55b81294baff1e SHA-1: 3630f0677e346b1a535e64a8312da622cd1c20a3 SHA-256: 82f0115caa6ee9b8deb0362862b9b417e2a38a6c20aa26cc328a7c09e0605b27
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=lowe+s+employee+handbook+online PDF link annotation
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/mapagotugafodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f8b496c9af68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_5f8c2b0bb0390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f92a1ec1cb9a.pdfIn PDF document text
    • https://xakokizape.weebly.com/uploads/1/3/4/3/134343218/21011e.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://xanuvomapimiv.weebly.com/uploads/1/3/4/3/134342034/1823086.pdfIn PDF document text
    • https://dodonebonobegep.weebly.com/uploads/1/3/4/5/134597525/c900b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/83726941.pdfIn PDF document text
    • https://nijubar.files.wordpress.com/2020/11/xivaminajodefaxoxuzazig.pdfIn PDF document text
    • https://tojovaw651389336.files.wordpress.com/2020/11/fubipasikefop.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/munidimozulug.pdfIn PDF document text
    • https://nexujur.files.wordpress.com/2020/11/34322052965.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000cc78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCC78 17908 bytes
SHA-256: 6f7b8671c9a9b7413ffa75d70d3dcf18a7882fcd230ba7d36e0c67c7a4247882
font_00_sfnt_off000093d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D4 5440 bytes
SHA-256: d87cd6405b89cde0d0a8a928073701a2c90f08e22fd27f82051e8375aa67e9ab
font_01_sfnt_off0000a640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA640 11188 bytes
SHA-256: 0ef6184e418758c03a4d7105a676a1ae226212ddbb10cc28f8c1675cd3651f98

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