Malicious PDF — malware analysis report

Static analysis result for SHA-256 860b7a2d84e70c23…

MALICIOUS

PDF

42.8 KB Authoring application: Smallpdf Desktop
MD5: 3f89a29bcd3142b9f103de255081c405 SHA-1: 042b0d65e9e29f2dd441ebf7fbca0ae2e4035e65 SHA-256: 860b7a2d84e70c2318fe0864328fdff6b4e84da4f15ce9bb5d8e995288fb3740
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection also flags it as phishing-related. The document body, though heavily obfuscated, contains many of these URLs, suggesting the primary purpose is to redirect users to malicious content hosted on these external domains. No scripts were extracted from this sample.

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://vajo.baksmans.club/uploads/2020/01/28/2316193.pdf
    • http://kakoda.dienthoaimobile.com/uploads/2020/01/28/9105832.pdf
    • http://muzserwis.ru/uploads/2020/01/28/452a92e08a4b51.pdf
    • http://peral.1posvetu.com/uploads/2020/01/28/7212325.pdf
    • http://fisonabaka.vostok3.ru/uploads/2020/01/28/ca7d272af93bfe.pdf
    • http://lucky-opros.info/uploads/2020/01/27/buzisomadeniguwetul.pdf
    • http://kuze.itechieguru.com/uploads/2020/01/27/dakajewakodoxida.pdf
    • http://gama.mansbestfriendmemorial.com/uploads/2020/01/28/zitok_daziwu_towokujab_lirezafowumobo.pdf
    • http://dog.rutv.fun/uploads/2020/01/28/8907903.pdf
    • https://zoguvetom.weebly.com/uploads/1/3/0/3/130323461/916938.pdf
    • http://guven.swetozar.ru/uploads/2020/01/27/81ebac40e39e87.pdf
    • http://lovejemchughina.fun/uploads/2020/01/27/xuvuwedoxibek.pdf
    • http://ximi.likeforinsta.xyz/uploads/2020/01/27/fdde5ed2dc7.pdf
    • http://marcketplace.online/uploads/2020/01/27/pejemesafetatumo.pdf
    • http://rejeda.translogistic-svc.com/uploads/2020/01/27/bukudidadimukuwi.pdf
    • http://xoz.rkmw.ru/uploads/44487312.html#a+workbook+for+arguments

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013f6.bin
0e8c3e79c2ed92a281486ee9ccfaa346b68e7ccb088448ea66d41d0f67dd0cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6 8192 bytes
font_01_sfnt_off000060c5.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C5 16068 bytes

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