Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5673937769496a…

MALICIOUS

PDF

62.4 KB Created: 2020-06-21 20:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3072c376f41a832d34598959d0faee SHA-1: 88da31b955f085eb85d26b852c4df484b49fd79c SHA-256: df5673937769496a5aab409f67f36a3e4a67cf3cc8033953fd9f1cb10edf294a
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, identified as a link farm. The document body, though obfuscated, suggests a lure related to a 'France travel guide pdf'. The primary heuristic, PDF_SEO_LINK_FARM, indicates that this PDF is designed to redirect users to numerous other PDF files hosted on various domains. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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://beausbeautifulblessings.org/uploads/1/3/1/4/131406895/131406895.html#france+travel+guide+pdf
    • http://bagsofowl.com/uploads/1/3/1/4/131408913/nunemab_zodazevelevuf_viruvitudidute_jufokefenufopes.pdf
    • http://webdisk.bodypulsefitness.co.uk/uploads/1/3/0/2/130271098/697019a177.pdf
    • http://pciinc.org/uploads/1/3/0/6/130621066/lirosubat.pdf
    • http://h-i.co/uploads/1/3/1/3/131398575/a5f7f.pdf
    • http://hostmaster.kidwellybowls.com/uploads/1/3/0/6/130604312/9234830.pdf
    • http://webmail.pureperformancearmory.com/uploads/1/3/0/4/130476168/lizojes.pdf
    • http://74-123-78-212.mgwnet.com/uploads/1/3/0/5/130539373/zepazakutuzitum.pdf
    • http://d1uxc0.bdgct.com/uploads/1/3/0/5/130588795/96ea8f4.pdf
    • http://mlhconsultancy.com/uploads/1/3/0/5/130542717/925879.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_off0000b5cc.bin
c36ee36f888f22721f0e7e97b43d905532f592784b578d3e5ece18e63a6f1da0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CC 4932 bytes
font_01_sfnt_off0000c6a4.bin
526b826164ea0b39566667bf5391b6c74166ddd44ffe80f9127558f2a1eed172		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A4 11772 bytes

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