Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b9aa3812ba2373…

MALICIOUS

PDF

40.4 KB Authoring application: Inkscape
MD5: 28a6b6b753df0fb0906312e0b303574e SHA-1: 931e8e61d075b4f054e4168b490b1b1521dd6154 SHA-256: 79b9aa3812ba237386e4abe9d4400583279c01ad15ac3e901d8e384fb4fb162f
160 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of a link farm designed to direct users to malicious content. The presence of a 'download button' heuristic and ClamAV detection further supports a phishing or malware distribution intent. The document body, though heavily obfuscated, contains URLs that are likely part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bearcrack808.com/uploads/1/3/0/5/130551247/4dba0d6b.pdf
    • https://jepizalobatise.weebly.com/uploads/1/3/0/2/130272394/duvezotorugagub-xibulugisago.pdf
    • http://nesyb.net/uploads/1/3/0/5/130550857/8356381fb4c8dd.pdf
    • http://mesys-industrial.net/uploads/1/3/0/6/130639549/e40b4740a38.pdf
    • http://michellecmcadams.com/uploads/1/3/0/7/130739927/tenekok.pdf
    • http://allshortsuk.co.uk/uploads/1/3/0/5/130589207/fetepusi-kewufaneleve.pdf
    • http://6000hudson.com/uploads/1/3/0/4/130477864/rokorujo_kumuvo_wuzusif_midoxosibawax.pdf
    • http://meraglimholdings.com/uploads/1/3/0/6/130605179/a4415.pdf
    • http://50staaten.de/uploads/1/3/0/4/130490117/9029984.pdf
    • http://skillsbyhillz.com/uploads/1/3/0/3/130379711/tewigekawowij.pdf
    • http://springvillehighblt.org/uploads/1/3/0/5/130588572/raxiruvutukofikesom.pdf
    • http://monalisatravelling.com/uploads/1/3/0/5/130543240/mexal.pdf
    • http://misssupremepurityqueen.com/uploads/1/3/0/3/130379065/130379065.html#how+to+make+a+new+pst+file+in+outlook+2013

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000136f.bin
5e26ffb578ed64cf45289361db6d0582794f6af5bfe9bedc4121503b0432641a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136F 7900 bytes

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