Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd39cce7dbd6a0b0…

MALICIOUS

PDF

39.7 KB Created: 2020-06-06 05:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48bb405ba18fe9a55687ac02ee5c6e89 SHA-1: c15790ecdf301aa4740109c74e5cbda5d9597db4 SHA-256: cd39cce7dbd6a0b02df1b3be85a120fbcbc1698bffb3bfdce3bbc62f7df13f89
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating a link farm or SEO spamming operation. The document body, though partially corrupted, contains text related to 'pipefitter books free download' and the authoring application, suggesting a lure to external content. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious link distribution tactic.

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://webdisk.muebleriatorres.net/uploads/1/3/0/6/130604958/130604958.html#pipefitter+books+free+download
    • http://sacredcreationsdaycare.com/uploads/1/3/1/8/131871499/lamonugip.pdf
    • http://cookeryacademy.net/uploads/1/3/0/8/130814001/kokoxafoxe.pdf
    • http://en.concordiaball.at/uploads/1/3/0/6/130639797/2eac92.pdf
    • http://dwell.ardeasanctuary.com/uploads/1/3/0/8/130814258/jotebubowag-xapogafuvug-fupodukotolo-pozifefuj.pdf
    • http://nicedeal4you.com/uploads/1/3/1/0/131071137/7637118.pdf
    • http://virtualfunk.net/uploads/1/3/0/5/130589384/9028163.pdf
    • http://kidsnurseryart.co.uk/uploads/1/3/0/7/130740572/3419042.pdf
    • http://angie.cleangreenhomesllc.com/uploads/1/3/0/4/130483512/busakirumego_zazajaf_rigegafusiz_mupal.pdf
    • http://80at294.com/uploads/1/3/0/7/130739596/d4084def23.pdf
    • http://pacificperformancecoaching.com/uploads/1/3/0/3/130323249/53e0812b334d4b.pdf
    • http://webdisk.muebleriatorres.net/uploads/1/3/0/6/130604958/terms.html
    • http://webdisk.muebleriatorres.net/uploads/1/3/0/6/130604958/dmca.html
    • http://webdisk.muebleriatorres.net/uploads/1/3/0/6/130604958/policy.html
    • https://pakavekum.files.wordpress.com/2020/06/salozogefelozunaz.pdf
    • https://tijupogekipo.files.wordpress.com/2020/06/ferugedalipobimoxekekoge.pdf
    • https://togifiviliv.files.wordpress.com/2020/06/51030802569.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_off000056e6.bin
27a0a2d603e72b03a87c4a2828628540c2edb5b3dc33305d1fa44bdf1ba6309a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E6 10260 bytes
font_01_sfnt_off00007a6f.bin
a5d147d7bd18b26503d3c33574dd58c1a712efa6c18964afd118098ab6d59f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 7396 bytes

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