Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0837cd596c9824…

MALICIOUS

PDF

49.5 KB Authoring application: GIMP
MD5: b6df5c34a5e0a45ae224cd200e7b1f02 SHA-1: 68383963d9cc1e81f3209f955c98dfc53d7170f5 SHA-256: 0c0837cd596c982401a0888b76d9768af6e6d88c473e8c74f803c4c3a882053c
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output further support its malicious nature. The embedded URLs are likely used to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ariana-johnson.com/uploads/1/3/0/3/130323573/laromowuwopowifiru.pdf
    • http://myasia.com.my/uploads/1/3/0/6/130639729/1045334.pdf
    • http://fub.espace-clientsv3-0range.com/uploads/2020/01/28/321f1.pdf
    • http://nrsvirtualservicesdev.com/uploads/1/3/0/5/130588923/wawufizebuvipunul.pdf
    • http://jixaz.lesnayazastava.ru/uploads/2020/01/28/daporabagapenevatej.pdf
    • https://wudumopog.weebly.com/uploads/1/3/0/4/130435763/zigemoto_gawuzexejopa_wapipow_guvoviribeto.pdf
    • http://aikomatsuoka.com/uploads/1/3/0/4/130488141/putupetekilotokika.pdf
    • http://shelleyortner.com/uploads/1/3/0/6/130622091/3975862.pdf
    • http://getotufuj.vladen.biz/uploads/2020/01/28/70fcbdebd3.pdf
    • http://starfishcenter.org/uploads/1/3/0/6/130622103/130622103.html#minecraft+e%C5%9Fya+yap%C4%B1m%C4%B1+modu
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014b2.bin
761cfb10463e132c22e28c58a4257058902c5ad09589e17ffbe3161053652b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2 10368 bytes
font_01_sfnt_off00007b9d.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9D 16068 bytes

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