Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc663a7bd3bf15a…

MALICIOUS

PDF

42.9 KB Created: 2020-11-07 23:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6bef1ab32c1c5ff702dcc6028b509113 SHA-1: 1b5ffb131191e4ef52a92a643595b141453cb357 SHA-256: cfc663a7bd3bf15ab84aa4e573e703253a2b3c8140d25b7468d0768de16bdcbf
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://trafficel.ru/aws?keyword=aice+us+history+past+exam+paper+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f99b16ada16e.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/wivov.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/5059181.pdfIn PDF document text
    • https://bikipejuroninoj.weebly.com/uploads/1/3/4/4/134448394/tudimaxiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f934e613e11f.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/lerawoneli-gokuduguretaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/32c2ac2a-3ebf-4275-9ba1-022cdabc4a8a/oce_error_code_22550.pdfIn PDF document text
    • https://vivuvegutofo.files.wordpress.com/2020/11/set_theory_problems_and_solutions_algebra.pdfIn PDF document text
    • https://tusomoxuxa.files.wordpress.com/2020/11/xadinisuwuzovufuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee253f72-a32c-416b-b2f2-1ca27f180bff/jetakiv.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdfIn PDF document text
    • https://solavaje.files.wordpress.com/2020/11/napinezezakopanobewaburi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f31345-c23f-4672-a92e-9fa59796714f/latulojekovip.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000529d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x529D 5208 bytes
SHA-256: 8c26b19f2f61a65d64e0e25c1e00e6519a75c93978f616c080172f51c800bbc9
font_01_sfnt_off00006452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00006cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDF 10488 bytes
SHA-256: 922e0e4b4286381c0c3df5c6a6d3858e9d43dd5e70b97d57bc1ec316f7572a6e
font_03_sfnt_off0000909f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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