Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ca017fc7342085…

MALICIOUS

PDF

44.4 KB Authoring application: PDFedit
MD5: e756ac8dc501963975e781bce1cfe2ff SHA-1: 525e0330fa336a96e1a9dc1c7a3660ee57c34efc SHA-256: 72ca017fc7342085943d0f819a021ec12dbcca890e379d1580e8f2efa541d87d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://bubofivave.darkempires.ca/uploads/2020/01/29/1fce200603f68.pdf
    • http://mindfulcare.nl/uploads/1/3/0/2/130287462/xesurabuki.pdf
    • http://portlandhighschoolreunion.com/uploads/1/3/0/6/130605071/penaduwugoritizolap.pdf
    • http://galabunu.ed-pro.ru/uploads/2020/01/28/5691728.pdf
    • http://rifufe.woohoogay.com/uploads/2020/01/27/temugajekami.pdf
    • http://mcaroadsidedeals.com/uploads/1/3/0/6/130622023/c95eb8d3.pdf
    • http://diju.nolep-checker.net/uploads/2020/01/28/3671706.pdf
    • http://organisationalinterventions.org/uploads/1/3/0/5/130551659/7c7ee1046cc.pdf
    • http://msb-art-integration.com/uploads/1/3/0/5/130551656/kopevalosunileroj.pdf
    • http://snookathletics.com/uploads/1/3/0/6/130620982/laforagitiw_wesowokunevom_vatutal_luvujavomat.pdf
    • http://numaluvuf.familiarizarse.info/uploads/2020/01/28/6006104.pdf
    • http://prioritytertk.weebly.com/uploads/1/3/0/3/130323603/luxas.pdf
    • http://g-gladiolus.ru/uploads/2020/01/27/5a5d368a4a9d7f1.pdf
    • http://blackberry-flowers.ru/uploads/2020/01/27/rukinuzo_juloxivajom.pdf
    • http://pabuzufeko.caverna.info/uploads/2020/01/27/lijuvopowilo-sutemi-suzuvuwunozagu.pdf
    • http://tagmasters.us/uploads/1/3/0/6/130620873/130620873.html#wwf+global+footprint+calculator
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001458.bin
a64ea2092385528d34a4443b8c602330c7d310bc2bc0a8a7f807e76c1df58863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1458 8260 bytes
font_01_sfnt_off000065df.bin
d9295a9de58ca667fe73d257f43adf165129547366732abe893b2bf7a5b5863d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 16304 bytes

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