Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfebaebf59a639e4…

MALICIOUS

PDF

15.7 KB Authoring application: Scribus
MD5: 9d5d2f855fac2deea436cf10f3e6a2b7 SHA-1: 2c8ef9c5edb1ce0caa31fddb9a0415e704dd18b6 SHA-256: dfebaebf59a639e4ce2140cc7af13ac26ef6e86e28f38730e76f0ec017eb4887
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this pattern. The ML classifier also strongly indicated maliciousness. The document body itself is largely garbled but contains many of the same URLs, reinforcing the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 2

  • 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.
  • 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://dedej.barcelonaswing.cat/uploads/2020/01/27/9854386.pdf
    • http://mhsdoernbecher.com/uploads/1/3/0/2/130272880/d9cfd4.pdf
    • http://tavige.woltag.com/uploads/2020/01/27/6f1202b.pdf
    • https://daxakijegukopi.weebly.com/uploads/1/3/0/2/130274291/5225294.pdf
    • http://bowusiseb.showskazka.ru/uploads/2020/01/27/6843992.pdf
    • http://javipof.oprosniksell.xyz/uploads/2020/01/28/regipamerigixat_vafalodijuzaz_vadatedidataw.pdf
    • http://abingdoncc.org/uploads/1/3/0/6/130639309/mobolimipudev.pdf
    • http://johntobinjr.com/uploads/1/3/0/4/130488829/d41c5b.pdf
    • http://nowodudupu.luxary.fun/uploads/2020/01/27/nopozi-rugametesugil-xuduf-worexuravopope.pdf
    • http://rutofujise.audiostart07.icu/uploads/2020/01/28/juzepepupe_lilosokaxu_sumagodavokax.pdf
    • http://growingbolderfitness.com/uploads/1/3/0/6/130621143/laweguzekefisawifi.pdf
    • https://tetomotuzi.weebly.com/uploads/1/3/0/4/130476429/dufozez.pdf
    • https://malidobatupi.weebly.com/uploads/1/3/0/5/130542872/a9b50b8091e.pdf
    • http://marecjoyce.lighting/uploads/1/3/0/6/130640132/2ba41.pdf
    • http://plastyir.ru/uploads/2020/01/28/2208145.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000141e.bin
23cfcec4c8216323f035c8ed493441856edba25c915eee2d635658ae49bf48e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141E 8032 bytes

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