Malicious PDF — malware analysis report

Static analysis result for SHA-256 7849fc79973a772f…

MALICIOUS

PDF

47.9 KB Created: 2020-04-10 02:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 06e4e426d9ce70b2c83d23a0b1bd4483 SHA-1: 15d364432c6fab68b5de04486a05fa11aa5a58f4 SHA-256: 7849fc79973a772fd8dd182be74bafdb80153bc85ab7faf751b210d0e7076860
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or a method to distribute malicious content indirectly. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, preventing a more detailed analysis of the specific lure.

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://ginkgosoulmassage.com/uploads/1/3/1/3/131379844/131379844.html#vintage+vw+parts
    • http://ivoryleaguepublishing.com/uploads/1/3/0/7/130776824/disetoju.pdf
    • http://bizlift.co/uploads/1/3/0/5/130542773/guzifilinafosuput.pdf
    • http://cashmerecreations.com/uploads/1/3/0/9/130969599/77105721bc5727.pdf
    • http://napoleonconsulting.com/uploads/1/3/0/4/130435556/8820534.pdf
    • http://rethinklearningllc.com/uploads/1/3/1/3/131398294/7bd3f01f2207.pdf
    • http://niamhmoore.net/uploads/1/3/0/6/130620612/gupakaroz.pdf
    • http://samiraclecosmetics.com/uploads/1/3/0/7/130739720/gevenesuku.pdf
    • http://clinicaltrialsofamerica.com/uploads/1/3/0/5/130590656/felegi.pdf
    • http://janinakrepart.com/uploads/1/3/0/5/130588847/8391420.pdf
    • http://businessenglishchina.com/uploads/1/3/0/3/130313145/9f01f0d.pdf
    • http://blaughs.com/uploads/1/3/1/1/131163943/7663778.pdf
    • http://marksshaw.com/uploads/1/3/0/4/130483426/lozejefaribozo.pdf
    • http://msidiving.net/uploads/1/3/0/5/130588513/1313174.pdf
    • http://the-q-point.com/uploads/1/3/0/7/130776268/9f83b.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000900c.bin
8d498eee5b9a39c78f49b5e865e29407adf7983c546bbce4f315d368947d067f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900C 8760 bytes

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