Malicious PDF — malware analysis report

Static analysis result for SHA-256 400f8e9b3b794200…

MALICIOUS

PDF

42.1 KB Created: 2020-04-06 12:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0730dce28b6aeda6f9d075472941b9e3 SHA-1: faf0a04827f6340cbc8305992f4b20edfc7263f6 SHA-256: 400f8e9b3b7942007413122f1094950b96ada67f705afaf932b5cc0f29dbe1eb
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. The primary purpose appears to be directing users to a multitude of other PDF documents hosted on various domains. This technique is often used for SEO manipulation or to distribute further malicious payloads. No scripts were extracted, and the document body is largely unreadable binary data, making the link farm the most significant indicator of malicious intent.

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://peanutgalleryphotography14.com/uploads/1/3/0/7/130738565/130738565.html#ley+de+watt+que+dice
    • http://quantpioneers.net/uploads/1/3/0/3/130324270/jogidasawulekonu.pdf
    • http://naaboard.com/uploads/1/3/0/3/130313132/d8750546ec4902.pdf
    • http://blossom.ch/uploads/1/3/0/5/130551687/a0416c245.pdf
    • http://online-virtual-assistant.com/uploads/1/3/0/5/130589416/jikoluxabemuf_lovexiwezu_lopilazesedaro.pdf
    • http://cleverscience19.com/uploads/1/3/1/3/131384503/giniseboke.pdf
    • http://akasimple.com/uploads/1/3/0/4/130436173/45818a1bba9.pdf
    • http://fullflightcounseling.com/uploads/1/3/0/3/130313107/zemibawuxar_ziwoveduwulo.pdf
    • http://rediscovernow.com/uploads/1/3/0/5/130590499/32b95ef683adf.pdf
    • http://r2go.org/uploads/1/3/0/2/130272432/8782666.pdf
    • http://towingsanantonio.net/uploads/1/3/0/7/130738497/pavep.pdf
    • http://chillertunes.com/uploads/1/3/0/6/130620484/4099810.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_off000077b5.bin
ec17187510c0cb31e585a5665fb5427e7fd6fa9279fd790c9d11d8e93dd52ce2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B5 9496 bytes

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