Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2650298c0b90beb…

MALICIOUS

PDF

45.6 KB Created: 2020-11-06 05:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 359e7b3ff08a7ed0a90d5b4cb8950a2d SHA-1: 9d76628b5811a319fd539f1f26ce0e0bc882a583 SHA-256: a2650298c0b90beb2e1221154d585cd4a79368be95994de34de149f38fa2face
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=calendario+escolar+2019+-2020+sep PDF link annotation
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/nopuputid-noluv-pimiverenor-baresuzod.pdfIn PDF document text
    • https://moviwinexanasi.weebly.com/uploads/1/3/4/3/134314602/9988212.pdfIn PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/watatobigodukivuru.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5f9691b521f73.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/2776554.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/2ef23.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/pufegis.pdfIn PDF document text
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/xexubimagelavobagaro.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/luzobutebabenax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f94f3d2ae860.pdfIn PDF document text
    • https://weropejo.weebly.com/uploads/1/3/4/3/134321986/bepewofo.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/xaloni.pdfIn PDF document text
    • https://fikepeti.weebly.com/uploads/1/3/4/4/134489659/7514180.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/xanebavifamopez/zofeluforekuj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABE 5484 bytes
SHA-256: 33d0d194ffa7ea044577fad40522de040b163b41df6fbb38559e4c3d35d5fc2c
font_01_sfnt_off00006d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D70 11424 bytes
SHA-256: 632dfc070e730cde62de41525537a624ea7cc5fb51ab94ec08a779a11e8785b3
font_02_sfnt_off000092ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AD 16076 bytes
SHA-256: ceb30e69b2a1d6501fe8904d8a8466471eaa529f0958da5583c6585f97c9fab1

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