Malicious PDF — malware analysis report

Static analysis result for SHA-256 333ad6aa4ad22527…

MALICIOUS

PDF

30.7 KB Created: 2020-06-05 21:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e72fbf06aa6dfcab5116dcf86cd76a03 SHA-1: c4a64993e5bc96af2e5acd8e0c33f437868c861f SHA-256: 333ad6aa4ad22527c1264088d123636ab1e652316acbac8f5c6b1af301dcb734
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is characteristic of SEO spam or a link farm designed to distribute malicious content or drive traffic to compromised sites. The document body contains a reference to 'sexcetera episodes watch', suggesting a lure for potentially inappropriate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://resource-agencies.eu/uploads/1/3/0/4/130483592/130483592.html#sexcetera+episodes+watch
    • http://4ur.undesirable.us/uploads/1/3/1/6/131636747/9269001.pdf
    • http://onlypilots.com/uploads/1/3/1/4/131438176/podalar_muvirejekum_wotomalinus.pdf
    • http://excsim.com/uploads/1/3/0/7/130775942/nasopatugov-pinitatotabalid-xunefonamez-kevoxu.pdf
    • http://silverbehavioralhealth.org/uploads/1/3/0/4/130435741/2222893.pdf
    • http://cpanel.freelandrestoration.com/uploads/1/3/1/8/131871602/rezoda-jifatovi.pdf
    • http://geile-alina.com/uploads/1/3/0/7/130739012/41687440dc7.pdf
    • http://beachrealestatepros.com/uploads/1/3/0/6/130604048/3043293.pdf
    • http://thephotodoctor.net/uploads/1/3/0/6/130604126/f7f98.pdf
    • http://generaldisarrayband.com/uploads/1/3/1/8/131856224/f79bf6b026dfbc.pdf
    • http://espacemailcloud.com/uploads/1/3/0/2/130289399/d250bc2c6d35.pdf
    • http://avirenovation.com/uploads/1/3/0/6/130620728/zibavuriviripol.pdf
    • http://lilausydreamkr2.com/uploads/1/3/0/3/130323415/37b17323.pdf
    • http://cenumesapun.com/uploads/1/3/1/0/131071095/kimujotexif.pdf
    • http://resource-agencies.eu/uploads/1/3/0/4/130483592/terms.html
    • http://resource-agencies.eu/uploads/1/3/0/4/130483592/dmca.html
    • http://resource-agencies.eu/uploads/1/3/0/4/130483592/policy.html
    • https://jugowaxefij.files.wordpress.com/2020/06/mirorafuxurugirelijew.pdf
    • https://pamuniso852777187.files.wordpress.com/2020/06/76697668287.pdf
    • https://giwogixud.files.wordpress.com/2020/06/zesorezego.pdf
    • https://wafadonob.files.wordpress.com/2020/06/gedunisizuxug.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_off00004d80.bin
d9aabd8c7c78912c855342b688f33553d26c2c2ea3d71a7ea66c1263ae55e5a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D80 9836 bytes