Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5214477ad7a62f8…

MALICIOUS

PDF

43.8 KB Authoring application: LibreOffice Draw
MD5: c04be22a03ad0157236e38f8cd0bffa5 SHA-1: fa924b2a7969ebd46ac68da4f38a2b63e2a73846 SHA-256: c5214477ad7a62f86010cd8bb2d9cd9cc9f5510950f95374b2e0a46250063749
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a large number of external links, suggesting a link farm for SEO manipulation or malicious redirection. The ML classifier also strongly indicated maliciousness. The embedded URLs, such as http://nanitokon.vkbonus.fun/uploads/2020/01/28/1be521e7.pdf, are likely part of this malicious infrastructure. No scripts were extracted from this sample.

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://nanitokon.vkbonus.fun/uploads/2020/01/28/1be521e7.pdf
    • https://rijivawaxig.weebly.com/uploads/1/3/0/5/130542831/memelemebitubasu.pdf
    • http://batesabuba.dutchdeveloper.tech/uploads/2020/01/27/1216046.pdf
    • http://kafi.brainit.ru/uploads/2020/01/28/dofut-rasalesejuge-rexipig-nafoju.pdf
    • http://betobuwu.vitamin-b17.ru/uploads/2020/01/27/cff41bde.pdf
    • http://nugamatu.martinsembalagensam.com/uploads/2020/01/27/07bf516e.pdf
    • http://luferokuze.lechenie-psoriaza.ru/uploads/2020/01/28/tojez-pudebuzik.pdf
    • http://xuw.sellercentral-amazon-avs.com/uploads/2020/01/28/mapujitoveduk.pdf
    • http://theideal.info/uploads/1/3/0/6/130620556/wivuvemufo.pdf
    • http://zotus.rurostelekom.ru/uploads/2020/01/29/970cce3066.pdf
    • https://fumawudijuxoven.weebly.com/uploads/1/3/0/5/130590477/remibex-siwevudi-pubagokuke.pdf
    • http://cargo-floor.ru/uploads/2020/01/28/kozenumogis.pdf
    • http://mopidida.sharkdesarrollos.com/uploads/2020/01/28/jumusudis_kipavo.pdf
    • http://caredynamicsfl.com/uploads/1/3/0/3/130313186/a934296573.pdf
    • http://ricksmobilerv.com/uploads/1/3/0/4/130436234/130436234.html#pathfinder+kingmaker+beneath+the+stolen+lands

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001690.bin
8c740337881c00e3d2bd10af48c0a0a9c211f3fbb419c2a781487320eb4c2246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1690 9616 bytes
font_01_sfnt_off0000639b.bin
1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639B 16312 bytes

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