Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb23baf841c20da…

MALICIOUS

PDF

33.9 KB Created: 2020-06-25 08:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc933a2c512043fbadca1f0b0bd94fd5 SHA-1: 64bb37539a01b33613789c7ac1203a3804b3d542 SHA-256: 9eb23baf841c20dad6e620bfa8a235cac974d5bff36a18eb580a9406602d7874
92 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious websites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure and numerous external URIs suggest a content-luring or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://2rootsbrewingco.com/uploads/1/3/0/7/130776795/130776795.html#floyd+warshall+algorithm+example+pdf
    • http://mta-sts.mail.artisticreteleesburg.com/uploads/1/3/0/5/130539597/lenugajo.pdf
    • http://mail.iweg.asn.au/uploads/1/3/0/8/130874468/sobopidu.pdf
    • http://khdentalgroup.com/uploads/1/3/1/4/131406438/dabewodapifa.pdf
    • http://bonniesportfolio.com/uploads/1/3/2/6/132681885/cc05963ea2411e.pdf
    • http://rallen1.clayperformingarts.org/uploads/1/3/0/5/130589222/4088243.pdf
    • http://helioshotelpaphos.com/uploads/1/3/1/0/131070767/gawazipomiki.pdf
    • http://welovecurvybrides.com/uploads/1/3/0/2/130274343/detolojabadarida.pdf
    • http://hostmaster.yvetteaddocounselling.co.uk/uploads/1/3/0/4/130436018/ad0e8ece732.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_off000047eb.bin
c4c95d7c4518d0202dd639d67d770c0abf524e1a1f0238fa8146ed13a5bcd4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47EB 5356 bytes
font_01_sfnt_off00005a44.bin
052662a0c0b44eed501a7b7611f6c59da14b5336fb49858a2482a26c4648712d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A44 9812 bytes

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