Malicious PDF — malware analysis report

Static analysis result for SHA-256 820fcacb4bbef724…

MALICIOUS

PDF

38.7 KB Authoring application: ImageMagick
MD5: 5737b08e6ce1ab71705d0f6253c63fa9 SHA-1: dcf60b0cb3453286437e2f7cc1230d348680310d SHA-256: 820fcacb4bbef724302723be3d78b625bfcea9e24f8ced4f428b909057a4d03f
128 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the presence of embedded URLs strongly suggest a phishing or malware distribution campaign. The primary malicious URL identified is http://gejil.denta-s.ru/uploads/2020/01/29/a12925.pdf.

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://gejil.denta-s.ru/uploads/2020/01/29/a12925.pdf
    • https://genitotofifig.weebly.com/uploads/1/3/0/2/130288594/woguxopukigewonale.pdf
    • http://warur.pokupka-super10.ru/uploads/2020/01/27/299050.pdf
    • https://tamufofaxedosul.weebly.com/uploads/1/3/0/4/130483537/wixuvadakagonogu.pdf
    • http://gidolunat.1medvrn.ru/uploads/2020/01/28/84c5b.pdf
    • http://lifestyleshop.nl/uploads/1/3/0/6/130621548/4511113.pdf
    • http://nujalikuju.shopdochoi.tech/uploads/2020/01/27/2346121.pdf
    • https://zoxavabagabop.weebly.com/uploads/1/3/0/5/130551258/8192838.pdf
    • http://fuf.housemarkt.ru/uploads/2020/01/27/kululav-sajigiregaf-kagimuriku.pdf
    • http://rol30.ru/uploads/2020/01/27/sudexovaxijiri.pdf
    • http://insightin2music.com/uploads/1/3/0/2/130289173/130289173.html#tere+chehre+mein+woh+jaadu+hai+download

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001232.bin
28f5280de642147a692e526553164e4f883f88ee8c07934f4e256bb40f6dc913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1232 7716 bytes
font_01_sfnt_off00005052.bin
256e098a965ba04144e6a6aad610db4c97dbab4c21d16dadc8ce0e3a72e13680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5052 7972 bytes

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