Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca9367716fcfd65…

MALICIOUS

PDF

43.2 KB Created: 2020-03-31 01:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b67ecc57759ddbb732643c6aa7002af9 SHA-1: 282f05f8c3d6d643c10802fdac64939c32ee980d SHA-256: 2ca9367716fcfd65e9cc508e8bf187659e84ab8e2addf997c06eeb489308b560
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDFs hosted on various domains, indicative of a link farm or SEO poisoning attack. The ML classifier strongly flagged this PDF as malicious. The primary lure appears to be disguised as 'Maclaren quest stroller assembly instructions', directing users to a specific URL which itself is part of a larger network of similar PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://brakeactive.com/uploads/1/3/0/5/130551230/130551230.html#maclaren+quest+stroller+assembly+instructions
    • http://fortune500resume.com/uploads/1/3/0/6/130640079/gopenirezomafejabel.pdf
    • http://davescustom.info/uploads/1/3/0/5/130541846/zagokubijej.pdf
    • http://jsfrealestate.com/uploads/1/3/0/2/130288441/9205820.pdf
    • http://websecurize.fr/uploads/1/3/0/7/130740180/zajel-baluwe.pdf
    • http://212thirdst.com/uploads/1/3/0/6/130604742/f84ab.pdf
    • http://peteandlily.com/uploads/1/3/0/3/130313067/zezavuxi.pdf
    • http://blackfridayvape.com/uploads/1/3/0/8/130874073/difulo-bopixaga-kapetenopotu.pdf
    • http://bsc5k.org/uploads/1/3/0/7/130739829/2284435.pdf
    • http://no1southamptonremovals.com/uploads/1/3/0/2/130289339/f76dfd3bd6.pdf
    • http://obchannel8.com/uploads/1/3/0/2/130287310/8935630.pdf
    • http://lydia-gaertner.de/uploads/1/3/0/2/130289222/dasaroropinuk.pdf
    • http://aurafximaging.com/uploads/1/3/0/6/130603942/kozuziwas_luzuxokerewipu_razagelizule.pdf
    • http://wylandnorthshoreestate.com/uploads/1/3/0/6/130620416/93afb87eb31ee.pdf
    • http://sacrificialted.org/uploads/1/3/0/9/130969329/1467991.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_off00006917.bin
2c345f4aca97f1c0aa1d20c6b7e11fd65654dee518bf1bea835a08ce1315773f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 8612 bytes
font_01_sfnt_off000089e4.bin
0f23141ba94d37b49c53016ac63a9b008a6ac8e4c4656a8d80e6725f77750189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E4 16140 bytes

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