Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc42b1328922bf40…

MALICIOUS

PDF

52.4 KB Created: 2020-11-06 17:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 81136f5d1cc9811fdeedb48b10d5d7c5 SHA-1: 2db57cadb6f67a46f34463fe35a415698cfcb9ff SHA-256: fc42b1328922bf4048f3a8237824b181aa59d028a875fff842288457fb8efa23
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=rmw+2.2g24+repair+manual PDF link annotation
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/6064484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f87839513e75.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/refenini-xiwepixubazigak-lodarukujelulo.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/3dac9b.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/vogegujubiwiv_xekego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460230/normal_5fa528a4bd665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424341/normal_5fa52e7b787d3.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/zebarufuridorur/jafukaniz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80843b8d-900d-4add-9ccb-4e463cda1cff/58067798181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bf57b3-5f42-4402-b3cd-4a5ace3a14f2/55272590502.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/pojekukibusokilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21dba60-3ec4-4810-8c21-ecc883bb802e/43898582211.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/the_classroom_3_newgrounds.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_off00007126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7126 5312 bytes
SHA-256: 8d17aee5b1bac6478949b7581f53d22b6303add4ac364eeb10bffaa2fd432bdc
font_01_sfnt_off00008349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8349 12160 bytes
SHA-256: c5d6597bd5d0478e478f1844372d9116a866773ec6eae49c66b8b538decc5005
font_02_sfnt_off0000ab97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB97 17312 bytes
SHA-256: f64a80742e474b4394af8051df30e2627300f73c52b9cddaf98ded35ea1d32ff

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