Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b08c6b6ac8c3dcb…

MALICIOUS

PDF

36.6 KB Created: 2020-03-30 08:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d84c53f9ef8e845e6052b6427df5732d SHA-1: 9ea6ab8f99a1a5dd81a9f3677c015a56b2c00393 SHA-256: 4b08c6b6ac8c3dcb4fbfa6769e0967dd97392be96736e589138f0844552022e0
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is classified as malicious due to its structure, which includes a large number of external links pointing to various domains. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The ML_NYX_PDF_MALICIOUS model also strongly flagged this file. The embedded URLs are the primary indicators of malicious intent, suggesting a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://benkregel.com/uploads/1/3/1/1/131164027/131164027.html#our+common+future+1987+wikipedia
    • http://bridalshopmd.com/uploads/1/3/0/5/130589243/3025035.pdf
    • http://soivan.com/uploads/1/3/0/7/130775465/tukakija_pejelam_govumidipe_kegapogove.pdf
    • http://tokyonails.se/uploads/1/3/0/5/130588980/jomob.pdf
    • http://girlscaninc.com/uploads/1/3/1/4/131406013/740911.pdf
    • http://katthjalpenaland.com/uploads/1/3/0/5/130547846/4599847.pdf
    • http://londonmakeupartisthairuk.com/uploads/1/3/0/6/130603930/5988800d0.pdf
    • http://doeyzeedesigns.com/uploads/1/3/0/7/130740537/8807763.pdf
    • http://hardartclothing.com/uploads/1/3/0/7/130738707/nimiz.pdf
    • http://vitallifehypnosis.com/uploads/1/3/0/3/130323996/7245181.pdf
    • http://tiamaryskitchen.com/uploads/1/3/0/7/130739020/moxuwesariv_kotosimofiwepi_gukevirar_kusazofoxepuv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f1.bin
4885983b7d79cf12757555bae26261796276e5a1c9fc2362ff7dcefccfcfaecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F1 8784 bytes

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