Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b872d1e338fc937…

MALICIOUS

PDF

51.3 KB Authoring application: PDF Studio
MD5: d5321e8a27c99bbe1f6b48c1dc6dca1f SHA-1: 38128f20f72cb5c86891b38fb107ea029ac89e84 SHA-256: 4b872d1e338fc9379f4254ef7b000cacca2bbf0230e10df89e2a252bf63aa048
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing

The PDF file contains a large number of external links, identified as a link farm, which is a common tactic for SEO poisoning and phishing. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update. The ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.TtraffRobotInstall'. No scripts were extracted from this sample.

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://mlsweettreats.com/uploads/1/3/0/5/130590336/9917070.pdf
    • https://fewevexevupubi.weebly.com/uploads/1/3/0/4/130476579/64d8dc56112a7.pdf
    • http://boxinsideabox.com/uploads/1/3/0/2/130289443/55d400d25fa652d.pdf
    • http://jpshealandscape.com/uploads/1/3/0/5/130590338/pijuso.pdf
    • http://artemdeev.pro/uploads/1/3/0/6/130620852/787278.pdf
    • http://alexhowarthpt.com/uploads/1/3/0/3/130379365/6f716539160ccef.pdf
    • http://teacher-lounge.com/uploads/1/3/0/6/130604525/5034423.pdf
    • http://adtest.site/uploads/1/3/0/6/130604238/pimojotax-xumopegewozufem-rapexa.pdf
    • http://bandyandshinty.com/uploads/1/3/0/4/130435500/5101507.pdf
    • http://koju.vrkuzbass.online/uploads/2020/01/27/petilob_sedafozul_zakan_kiwowuzu.pdf
    • http://dandreams.com/uploads/1/3/0/2/130272470/vozulofelabak.pdf
    • http://wcmcphailhomeinspections.com/uploads/1/3/0/3/130313120/6a074d6.pdf
    • http://juwes.vipiski-besplatno26.icu/uploads/2020/01/27/55adb3b.pdf
    • http://yseo.weebly.com/uploads/1/3/0/4/130488295/6245759.pdf
    • https://losutiwulex.weebly.com/uploads/1/3/0/2/130271217/2b8106c.pdf
    • http://concretecuttingloganut.com/uploads/1/3/0/3/130379137/1a147ff2af.pdf
    • http://amazon-sellers-fba.com/uploads/2020/01/28/kasaperajakijed.pdf
    • http://rabiti.copyrightcontact-1000002341578.com/uploads/2020/01/29/3c823e82d1c1.pdf
    • http://splashyouth.org/uploads/1/3/0/3/130379363/nozuboxedexowo.pdf
    • http://clinicalsupervisionmsw.com/uploads/1/3/0/5/130588378/729219.pdf
    • http://basauribai.com/uploads/1/3/0/6/130639629/ratebagodekegi-podogux-nuxeputatekevu-gelovifoju.pdf
    • http://beavervalleychurchofgod.weebly.com/uploads/1/3/0/3/130323130/nalapo_linube.pdf
    • http://donnadoyle.pink/uploads/1/3/0/5/130551536/f3dc677a4d20.pdf
    • http://fiz.silane-guard16.ru/uploads/2020/01/27/8794011.pdf
    • http://thelackawaxenmusicfestival.com/uploads/1/3/0/5/130543006/beb4c09a8b23.pdf
    • http://misbailes.com/uploads/1/3/0/5/130590111/130590111.html#music+player+bar

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000102a.bin
880720e243bcd5d68209fc7d6b9d9b8f721908227a3b0bdf17821c86d99719b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A 9040 bytes
font_01_sfnt_off00008c5e.bin
8ec8c2252d1b0a1cc16637c0e1f77da7137146423e231c53be47bbaf832064ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5E 2048 bytes