Malicious PDF — malware analysis report

Static analysis result for SHA-256 336c3106abd1a1a4…

MALICIOUS

PDF

44.1 KB Authoring application: LibreOffice
MD5: e2c4e147f8a83ec65bce696d79a35931 SHA-1: dee793223bc9c4747e50d5cbf87b92f6abb45531 SHA-256: 336c3106abd1a1a4a4cc2ccf41686ad1c997d559425bb560e5c5f69d4157638e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which strongly suggests a link farm or redirection scheme. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm the malicious nature of the document. The primary intent appears to be directing users to a multitude of external PDF files, likely to host further malicious content or phishing pages.

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://lur.japher.site/uploads/2020/01/28/9ebd312a.pdf
    • http://lotclearinghouston.com/uploads/1/3/0/5/130542729/8e084abf.pdf
    • http://fish-paradise.ru/uploads/2020/01/27/628aad3c2170.pdf
    • http://carynmartinwellness.weebly.com/uploads/1/3/0/6/130639329/jododotepenigexopaxi.pdf
    • http://pudur.rosmedi.ru/uploads/2020/01/27/boxakupekare.pdf
    • http://aniefiokcosmetics.com/uploads/1/3/0/3/130324320/927125.pdf
    • http://r-mustangs.com/uploads/1/3/0/6/130622049/e3a7010b.pdf
    • http://mrjrealtalk.com/uploads/1/3/0/5/130588824/2639357.pdf
    • http://ramadanbar.com/uploads/1/3/0/4/130435937/lotavuvebinun.pdf
    • http://taburorav.pknovitek.ru/uploads/2020/01/28/dopilorivoj_nevukakev_witaditawapul.pdf
    • http://abbaproperty.com/uploads/1/3/0/4/130483385/af8b943c.pdf
    • http://lightcodesmusic.com/uploads/1/3/0/6/130620207/fumurupa_xudagozen_tuzotatalira_jikokologiveg.pdf
    • http://pobudebul.aidakit.com/uploads/2020/01/28/2527583.pdf
    • http://newiac.weebly.com/uploads/1/3/0/6/130604283/1920e919516.pdf
    • http://natureswaycbd.co.uk/uploads/1/3/0/4/130488542/bebif.pdf
    • http://suvabuw.galaxytools.ru/uploads/2020/01/28/xenagibexezosigeg.pdf
    • http://paulaweeksinternational.com/uploads/1/3/0/5/130550742/eeabafb0a.pdf
    • http://sportyogalady.com/uploads/1/3/0/6/130639901/a31de8b01f.pdf
    • http://bespokebuildersinc.com/uploads/1/3/0/4/130490665/juzatamotuzeko.pdf
    • http://mim.onkologinet.ru/uploads/2020/01/27/2403726.pdf
    • http://calacascalifornia.com/uploads/1/3/0/2/130272511/130272511.html#cervicogenic+headache+occipital+nerve+block

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000179b.bin
c575a01b75edcf7f6ce65d82f3c559a7afd454e6d5d0e611fcec27eb0b9b7b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x179B 8212 bytes

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