Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e92e0afb8f2a00e…

MALICIOUS

PDF

27.8 KB Authoring application: LibreOffice Draw
MD5: fd265bf1ac3ead6af30bf6a05c5c4506 SHA-1: 76f0858b790ad178917db4a06445116f052ec33f SHA-256: 7e92e0afb8f2a00e2fa9338fed16251285530066b7245b7c7fcd85f5cc8e57df
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially garbled, contains references to coloring books and Adobe, likely a lure to disguise the malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://mssarkisclass.com/uploads/1/3/0/4/130477455/silafuwageteme-lugereziwugage.pdf
    • http://devezog.dmytro.it/uploads/2020/01/28/baa2b.pdf
    • http://ex-statics.com/uploads/1/3/0/4/130490078/dusosaminidejaz_mawemozi_suxuxuw_jefefexumeliw.pdf
    • http://dieseldocdenver.com/uploads/1/3/0/6/130620694/tenulobub_pememafozubake_towiso_zokaxitos.pdf
    • http://printable-ebooks.com/uploads/1/3/0/3/130323491/zojeviwel.pdf
    • http://sandiegosuperlawyers.com/uploads/1/3/0/4/130483062/ce62e154ea.pdf
    • https://botavaxemigog.weebly.com/uploads/1/3/0/3/130379361/e2a11c30.pdf
    • http://nileinstitute.org/uploads/1/3/0/3/130323894/tifipeguxeguxekogu.pdf
    • http://musmuin.com/uploads/1/3/0/6/130604294/5894684.pdf
    • http://nickmartine.com/uploads/1/3/0/6/130639895/leneniniru-mekitujowo-lepipoxo.pdf
    • http://dustbuster.us/uploads/1/3/0/6/130605368/rudibawuzojenal-tanujubewisuri-guzef.pdf
    • http://wthsnz.com/uploads/1/3/0/6/130603834/pumokun.pdf
    • http://podollangpis.devsite-1.com/uploads/1/3/0/6/130621664/130621664.html#letters+coloring+book+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ad.bin
234f4b2ded4b0cab1f8f1ed8b9f933ca10705e42db8af6eb32c3e9c3d619ebd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD 6184 bytes

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