Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a56cedba427357…

MALICIOUS

PDF

44.1 KB Authoring application: Smallpdf Desktop
MD5: e2b157760ae7a7199e56f54cef692659 SHA-1: ef3b257169234d08a70eada9a2f4a39d3d033cbb SHA-256: c9a56cedba4273573d4d6edba71fb12f095d85a1e28563f9f2cb2fe164741b35
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm for SEO or traffic redirection. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick the user into installing a browser extension or update. This is further supported by the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0', which points to a phishing and traffic redirection scheme. The primary intent appears to be social engineering users into installing potentially malicious software or visiting malicious sites.

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://prettybakedqueens.com/uploads/1/3/0/4/130488181/3663408.pdf
    • http://poguzek.rentkazan.com/uploads/2020/01/29/832712.pdf
    • http://hasanpeays.net/uploads/2020/01/28/figaduxoref.pdf
    • https://fedafoxaj.weebly.com/uploads/1/3/0/5/130588531/bikigasevelujupago.pdf
    • http://msbr.ca/uploads/1/3/0/6/130620943/7677750.pdf
    • http://bnaiisraelnc.com/uploads/1/3/0/4/130477775/xesobasun_pugomikut.pdf
    • http://kuteandkurvy.com/uploads/1/3/0/6/130621946/mujotajedoda.pdf
    • http://cbconservation.com/uploads/1/3/0/5/130547728/serepar-xamivibetanojaw-vijozufelog.pdf
    • http://msmaco.com/uploads/1/3/0/4/130488626/3210672.pdf
    • http://aprilfricke.com/uploads/1/3/0/5/130551072/7173777.pdf
    • http://bsmithcontracting.com/uploads/1/3/0/6/130605492/1777abcd4ca5c5a.pdf
    • http://cascadeinvestor.com/uploads/1/3/0/4/130476098/8772699.pdf
    • http://stylesnsmilessalon.org/uploads/1/3/0/6/130639215/66bf106ca3e87.pdf
    • http://vokudovoz.100kakrd.ru/uploads/2020/01/28/logafis_kubitutesamexit_xarusubaxuvek.pdf
    • http://mesosu.evacuator-perm.com/uploads/2020/01/28/tavabatuniloj.pdf
    • http://jevolare.paypal-support-limitted.com/uploads/2020/01/27/gesusajezaxade.pdf
    • http://montessorimentor.org/uploads/1/3/0/2/130272474/fifuwax.pdf
    • http://wup.ajarnarm.com/uploads/2020/01/28/weneze-liguborema-rexedamegosavok.pdf
    • http://amartvn.com/uploads/1/3/0/6/130620982/fexaxoxope.pdf
    • http://dekufuxari.cabinet-otpbank.info/uploads/2020/01/29/315939.pdf
    • http://abundantpeacechildbirth.com/uploads/1/3/0/2/130291350/4548056.pdf
    • http://mgodfreycreative.com/uploads/1/3/0/6/130639571/130639571.html#chrome+windows+32+bit

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001660.bin
77793c80d9a10f4b7a6673219a3fb4914e8a64e66b5d2516513cc8f1b95390ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1660 8284 bytes
font_01_sfnt_off000064e8.bin
45c39c4315a5d00962143d4102937301eb2649728d6de39b959633cfc30365c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x64E8 16144 bytes