Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7c6e1bebca83dd…

MALICIOUS

PDF

36.7 KB Created: 2020-03-25 12:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bafcbf7bdbeedec6d6cc341639af0906 SHA-1: 0b3e773b0065146fe4ee5841d1332f7839395c5b SHA-256: 3e7c6e1bebca83dd24203221cf36395533b49acef8b47b13dd1981fd5325f3bc
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF lures. The document body mentions 'Dell v520 printer wireless setup', suggesting a social engineering pretext to encourage users to click on the embedded malicious URLs. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to distribute malicious content.

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://nofone.net/uploads/1/3/1/3/131380992/131380992.html#dell+v520+printer+wireless+setup
    • http://360pro.be/uploads/1/3/0/6/130620632/putifefoke.pdf
    • http://www.ppmonline-shop.com/uploads/1/3/0/7/130739287/2603688.pdf
    • http://blockchainbetterbusiness.com/uploads/1/3/0/5/130589354/6e5288fbd5.pdf
    • http://naturomedicbw.com/uploads/1/3/0/2/130289224/93bea9f996e5840.pdf
    • http://www.a21stcenturychurch.com/uploads/1/3/0/2/130288378/a80de646ac2cd4.pdf
    • http://maid2sparkle.net/uploads/1/3/0/5/130588290/75a0600531e.pdf
    • http://hostmaster.thatfunkytrio.com/uploads/1/3/0/6/130604290/jakirolow-takajeronubon-sixubo-tupisa.pdf
    • http://www.newtonanchorbar.co.uk/uploads/1/3/0/4/130489437/riwijal.pdf
    • http://www.mikebowden.uk/uploads/1/3/0/9/130968925/vuromipe-tinekizuvakuk.pdf
    • http://artsourcekc.com/uploads/1/3/0/5/130539448/doxasupuxabiv.pdf
    • http://trustmarkroofing.com/uploads/1/3/0/8/130814788/3463d91f.pdf
    • http://anchorchurchelpaso.com/uploads/1/3/0/4/130489742/77200e479cb0.pdf
    • http://www.lgcy-brand.com/uploads/1/3/0/8/130813992/6488520.pdf
    • http://arlingtonlimoservice.org/uploads/1/3/0/6/130620340/tudezumejawe.pdf
    • http://madtwinbeats.com/uploads/1/3/0/7/130739603/8026702.pdf
    • http://mephisthonhacking.org/uploads/1/3/0/2/130289686/2356794.pdf
    • http://donovandesignandconsulting.com/uploads/1/3/0/5/130551941/9ec7ccb5f68.pdf
    • http://www.succeed2serve.org/uploads/1/3/0/6/130604638/f22f56faa744ef3.pdf
    • http://morris-imports.com/uploads/1/3/0/7/130739763/221353.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_off00006070.bin
eec28d78a486d376307ff6bfbaa689782d05b0defa3645aef75a322082c8dc8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6070 7036 bytes
font_01_sfnt_off00007c60.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C60 1708 bytes

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