Malicious PDF — malware analysis report

Static analysis result for SHA-256 077840674f46c7bc…

MALICIOUS

PDF

36.9 KB Authoring application: Nitro PDF
MD5: 75cbfbac1c57508fda8d8a142b708dc3 SHA-1: 62ac1fcb98d1dba56fef0c1993845e250af13bbf SHA-256: 077840674f46c7bc89cb0d76c857d2da7d9becd350964da0440e8adb526e9a94
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a phishing or redirection attempt. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output further support malicious intent. The embedded URLs are likely used to download secondary payloads or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://livinginharmony2014.org/uploads/1/3/0/4/130476721/fokiti.pdf
    • http://comesailingcharterschicago.com/uploads/1/3/0/5/130590355/voduxap.pdf
    • http://lezidisev.mummys-gold.ru/uploads/2020/01/28/8673571.pdf
    • https://vujumetuzosave.weebly.com/uploads/1/3/0/4/130476122/wafego.pdf
    • http://xadukon.pinapp.ru/uploads/2020/01/27/xatafe-povivudevavax-xagiwuw-rasaveg.pdf
    • http://canyonsohana.com/uploads/1/3/0/5/130589195/tadizifikut_kulavobi.pdf
    • http://zikijes.za-rya.ru/uploads/2020/01/29/wujajavaxi.pdf
    • http://tatixibu.gotechsolucoes.com/uploads/2020/01/27/4045185.pdf
    • http://absystemsllcscam.com/uploads/1/3/0/5/130539416/130539416.html#acer+predator+helios+300+keyboard+light+change

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001234.bin
d7b9de45ddec60b54281a52b36ec5133b7907f9001f0b360dd73aa98b89a211b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1234 9172 bytes

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