Malicious PDF — malware analysis report

Static analysis result for SHA-256 365a35b27894b811…

MALICIOUS

PDF

38.7 KB Created: 2020-04-02 07:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 89d8e7d74e533cc19a0a63d200417a24 SHA-1: 43fe41c0bd01fe71a0a66846898f1ae9a70accff SHA-256: 365a35b27894b811ebc01440caaf6d4fdf852fac96d153f90e10d842a21abda0
62 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or a distribution network designed to obscure the ultimate malicious payload or to manipulate search engine results. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this malicious intent. No scripts were extracted, and the document body is largely unreadable binary data, making it difficult to determine the exact nature of the lure.

Heuristics 3

  • 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
  • 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://kimresine.ca/uploads/1/3/0/7/130775563/130775563.html#homotecia+positiva+y+negativa+ejemplos
    • http://deborahlifestylemaven.com/uploads/1/3/0/8/130874012/4802942.pdf
    • http://annamolnarjewellery.com/uploads/1/3/0/6/130621784/e3ff563de.pdf
    • http://autodiscover.mark2inc.org/uploads/1/3/1/3/131384599/dexetaxinuw-peduzoketow-kakejaxokimiko.pdf
    • http://thesetpractice.com/uploads/1/3/1/4/131411474/daregexuxafemuk-kolojirut-gupuw.pdf
    • http://brittanyjreid.com/uploads/1/3/0/7/130776212/fodifuvonixi.pdf
    • http://michaelmccormackarts.com/uploads/1/3/0/8/130874019/5910122.pdf
    • http://interfacehr.com/uploads/1/3/0/5/130588627/xafaf_totegorefemorov_muzosojedijowut.pdf
    • http://piano4t.net/uploads/1/3/0/5/130539300/63d793228494e.pdf
    • http://execsecurity.ca/uploads/1/3/0/2/130289803/notitinukewo.pdf
    • http://ansorbanserpackedungjati.com/uploads/1/3/0/3/130379121/9678659.pdf
    • http://topdesigndrivesandpatios.com/uploads/1/3/1/3/131397973/42b20a647.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d4.bin
2baacd08d3dd36ecae935b2dca80e112e5a971b694c6558dbc20c1ea97fc35f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 8392 bytes
font_01_sfnt_off000082b4.bin
63f5e27ee3d24cc00d413e59c301cc73ab377383609796993547673f2bea898c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B4 2600 bytes

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