Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f489b5322d8b58…

MALICIOUS

PDF

41.9 KB Created: 2020-03-14 11:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a0aa54d4f024614d31411d8998ea0aa4 SHA-1: 8e0405b22d6f43227a153bf3b808b29f5a3bd84a SHA-256: 92f489b5322d8b58942333785fc75fb30882b2fb5b16fa7c03408abfb51bb4c8
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or distribution network. The ML_NYX_PDF_MALICIOUS heuristic also strongly flags this file as malicious. No scripts were extracted from this sample, but the sheer volume of external URLs points to a malicious intent, likely to redirect users to further malicious content or exploit kits.

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://ibcbet.lucky1st.com/uploads/1/3/0/3/130313063/130313063.html#android+recyclerview+layoutmanager+types
    • http://fitfamboca.com/uploads/1/3/0/7/130739180/pemiji_vubat.pdf
    • http://universeoftoronto.com/uploads/1/3/0/5/130538956/376ea1.pdf
    • http://a1515530xstreamtravel.xsideas.com/uploads/1/3/0/7/130739381/6281981.pdf
    • http://farmhousedelux.com/uploads/1/3/0/4/130483981/dobulibefojodo.pdf
    • http://northforknews.net/uploads/1/3/0/3/130313766/xarigerege_xonusi_rikajema_netomajorimojin.pdf
    • http://www.kisp.ru/uploads/1/3/0/5/130590503/vakeku-xodane.pdf
    • http://yawslegin.com/uploads/1/3/0/5/130590673/297383.pdf
    • http://jessicamichellemonette.com/uploads/1/3/0/4/130476322/gixun-diriwopa-mivugosox-rokexedukubi.pdf
    • http://smithfieldhousingauthority.org/uploads/1/3/0/6/130620811/japaguretof-letovoxop-bowepi-konopedawul.pdf
    • http://hostmaster.glhairandbeauty.co.uk/uploads/1/3/0/7/130776817/lexarife-pafiputinu.pdf
    • http://calloniris.com/uploads/1/3/0/4/130477882/voloriritevuf-viseletat.pdf
    • http://bettertogether.press/uploads/1/3/0/8/130873954/jilagowolesazamonin.pdf
    • http://cosmicbabies.org/uploads/1/3/0/3/130323593/845b34ce.pdf
    • http://14weekends.com/uploads/1/3/0/2/130289154/3502837.pdf
    • http://umbau.us/uploads/1/3/0/3/130324192/dc9902e301.pdf
    • http://www.672woodworks.com/uploads/1/3/0/5/130589207/d34aa103450d.pdf
    • http://lampsurfcompany.com/uploads/1/3/0/7/130775980/c0430425cd77.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_off000064de.bin
f90a7e29001460dd3e08c45f5d1090dba5c36c067c99afa11e4ab75eef4311de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 7996 bytes
font_01_sfnt_off000083f7.bin
1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F7 16312 bytes

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