Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20fc9ce68a30ac8…

MALICIOUS

PDF

42.1 KB Created: 2020-03-12 11:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b6d69bf5871e28b1f9985c4d8d5fdd18 SHA-1: 3c860090a7fcc24a7f4f081d589cf66561d7a222 SHA-256: d20fc9ce68a30ac8b8a269bee4121242edb4b1ca26342e2b4dcca100ba594ad5
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of SEO-optimized PDF files, likely as a lure for further malicious activity.

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://nobubarcelona-emea-cat.devsite-1.com/uploads/1/3/0/2/130291593/130291593.html#fase+hidup+fasciola+hepatica+adalah
    • http://carolinastarrealty.com/uploads/1/3/0/7/130775951/zunoxipi-wogabumijas-kutevakoka.pdf
    • http://nosleepovereverything.com/uploads/1/3/0/4/130478259/9303912.pdf
    • http://warehousesixmusic.com/uploads/1/3/0/7/130775722/50d75759e4f17.pdf
    • http://palomarpools.com/uploads/1/3/0/7/130776110/3556451.pdf
    • http://vaguely-specific.com/uploads/1/3/0/8/130873994/19231.pdf
    • http://joyzwish.com/uploads/1/3/0/9/130969591/xofaged.pdf
    • http://www.benzandbmwrepair.com/uploads/1/3/0/6/130603904/rabetoroma.pdf
    • http://francestors.com/uploads/1/3/0/2/130291786/4166189.pdf
    • http://www.howgills.net/uploads/1/3/0/6/130604452/femevuf.pdf
    • http://startrekgenesis.com/uploads/1/3/0/9/130969027/65d91f83345a731.pdf
    • http://jonnyzero.net/uploads/1/3/0/7/130738578/fuzipopol.pdf
    • http://mykccconline.com/uploads/1/3/0/5/130588989/kuludokuzofuwuwer.pdf
    • http://www.completecarpetrecovery.com/uploads/1/3/0/7/130775674/miduzajebev.pdf
    • http://paapsinternational.com/uploads/1/3/0/6/130639886/9642692.pdf
    • http://mx1.adirunesaritmica.com/uploads/1/3/0/5/130546543/jatuzivuka.pdf
    • http://blackhawklocksmiths.com/uploads/1/3/0/2/130291489/ludafulisimumeb_gasidumip_disamewabuweba_dibote.pdf
    • http://jornadasadopcionzaragoza.com/uploads/1/3/0/7/130739664/kekes.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_off0000736a.bin
42f996db4fed8496a710d9395998d47de2d29b5c25f07238f292e18bbfade0b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736A 7616 bytes
font_01_sfnt_off00009152.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9152 2652 bytes

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