Malicious PDF — malware analysis report

Static analysis result for SHA-256 165bdd63020d0139…

MALICIOUS

PDF

63.1 KB Authoring application: LibreOffice
MD5: f1879f7486660bea6095441247940636 SHA-1: bd6c2489c16abd2f0eb5fa081a5b3298ff1b1546 SHA-256: 165bdd63020d01395bbb6ba1d73abf19119f9a839cda78cc5dd6af65ac52f90b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content, possibly as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://histoire-memoire.net/uploads/1/3/0/4/130436122/xixorilo-nutiworetiso-famixibesetid-zekulerimi.pdf
    • http://www.natural-autumn.com/uploads/1/3/0/5/130588221/xitojizoke.pdf
    • http://wrfabc.ca/uploads/1/3/0/6/130604548/rokiwokiri-fapopini.pdf
    • http://hostmaster.sherrywalterscounselling.co.uk/uploads/1/3/0/6/130603860/bbcf55f3b992d.pdf
    • http://northerndriveschool.com/uploads/1/3/0/5/130540280/986f193fa.pdf
    • http://balanced-for-success.com/uploads/1/3/0/6/130605097/vowababuvukuxumitafu.pdf
    • http://nileshsp.com/uploads/1/3/0/6/130639242/wogosimunaxonobim.pdf
    • http://inspirechest.com/uploads/1/3/0/5/130589338/bowakenekafasi.pdf
    • http://nloilfield.com/uploads/1/3/0/7/130739584/859c748b5.pdf
    • http://www.best-self.co/uploads/1/3/0/6/130604882/2c71d7508ce809.pdf
    • http://hostmaster.aenderungsatelier-osterstrasse.com/uploads/1/3/0/3/130324092/futuzo.pdf
    • http://brookeholden.com/uploads/1/3/0/5/130543757/genodojirogoda.pdf
    • http://katiesjerky.com/uploads/1/3/0/6/130639740/4146782.pdf
    • http://msrhondajwilliams.com/uploads/1/3/0/3/130313299/5a98c.pdf
    • http://creekviewanglers.com/uploads/1/3/0/6/130621197/4456001.pdf
    • http://smaese.com/uploads/1/3/0/2/130288380/lalawa.pdf
    • http://granniesgrandfiesta.com/uploads/1/3/0/6/130639294/9059365.pdf
    • http://keetleyart.com/uploads/1/3/0/6/130604564/5be3dc9c9157a7.pdf
    • http://apartments-jelovca.net/uploads/1/3/0/5/130550749/doratabavarixi.pdf
    • http://swag-walk.com/uploads/1/3/0/6/130620773/wewuvojeloxek_kesejupipe_dewodepog_niwaw.pdf
    • http://projectblkbird.com/uploads/1/3/0/2/130270912/woruvofab_korufidezope_xepokogeda.pdf
    • http://borealstick.com/uploads/1/3/0/6/130605212/kebowepizorigafazeru.pdf
    • http://www.chezparadis.co.uk/uploads/1/3/0/2/130291415/907511.pdf
    • http://ddlgverse.com/uploads/1/3/0/7/130775822/7080919.pdf
    • http://leadinglearninglisa.org/uploads/1/3/0/8/130874566/130874566.html#navneet+writing+skills+in+english+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000017b6.bin
c66d765f27653ed2c30a5fd4a93ec67a68a173f820b7ff7971563f7f49c150cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B6 8768 bytes

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