Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf6d4751016062e…

MALICIOUS

PDF

38.8 KB Created: 2020-04-11 08:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e7ec8dc63f180e718337e09272fe7e5d SHA-1: 8106a7f6971f5b3a53ab04e7f55349d8720802fd SHA-256: ccf6d4751016062edd450cca6a79d080bf763c3897a025c728078d392e86e0ff
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are structured as SEO-optimized PDF slugs, indicating a link farm or redirection scheme. The document body, though partially corrupted, contains text related to 'Bushcraft 101' and references wkhtmltopdf, suggesting a lure to disguise the malicious intent. The primary URL points to a page with similar content, likely serving as a landing page for further malicious activity.

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://74-123-76-25.mgwnet.com/uploads/1/3/0/8/130874233/130874233.html#bushcraft+101+a+field+guide+to+the+art+of+wilderness+survival
    • http://stevensonelectrical.com/uploads/1/3/0/4/130483918/3228346.pdf
    • http://episcopalschuyler.org/uploads/1/3/0/9/130969407/bubujew.pdf
    • http://magadha-cattery.com/uploads/1/3/0/6/130639845/6539377.pdf
    • http://erevalue.com/uploads/1/3/0/3/130313177/2975ac3.pdf
    • http://tvessencemelts.com/uploads/1/3/0/8/130813934/832e9b9a8.pdf
    • http://urbsight.com/uploads/1/3/0/3/130323115/navizijamozexotutow.pdf
    • http://tianalyticsltd.org/uploads/1/3/0/4/130483216/jetaberololu-vanamijoraxunav-pezavuluwuk-mikedo.pdf
    • http://kaslou.shop/uploads/1/3/0/7/130775292/tufajixufafid.pdf
    • http://countryrentalinfrance.com/uploads/1/3/1/4/131437491/954388a56e.pdf
    • http://unfiber.com/uploads/1/3/1/1/131163841/tedazejojubufo_tolutas.pdf
    • http://justtaxes.org/uploads/1/3/0/4/130477048/9014016.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_off00006e44.bin
bd7db1be1c7d94aa1eb8d20e7a1b3fc662deb56405b4ff34190ebbcadcca680a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 8584 bytes

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