Malicious PDF — malware analysis report

Static analysis result for SHA-256 03905328d44f121e…

MALICIOUS

PDF

39.5 KB Authoring application: Soda PDF
MD5: 6c04f93a115dac35d96812cb3404e788 SHA-1: 720430a4e2ab50ae1615f1b97f7d033241d56ae9 SHA-256: 03905328d44f121e6365f528cae31e5ad1dea2f74cf3ea8d5fc4b8d67de9470c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links pointing to other PDF files across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. The ML classifier also strongly flagged this PDF as malicious.

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://ampersandcurated.com/uploads/1/3/0/5/130588297/70994.pdf
    • http://nancytoofani.com/uploads/1/3/0/4/130435659/vibisaw-nosokejomowotum.pdf
    • http://pif.lifeneo.com/uploads/2020/01/27/dazefe.pdf
    • http://xubanire.mstudioland.ru/uploads/2020/01/27/9133238.pdf
    • http://northeasternohiomasonry.com/uploads/1/3/0/6/130621243/ritatifonuwef_ziwabi_sivivoz.pdf
    • http://skylighthk.com/uploads/1/3/0/6/130621187/87c7ce.pdf
    • http://asbpw.com/uploads/1/3/0/2/130288864/5990889.pdf
    • http://bespokebuildersinc.com/uploads/1/3/0/5/130590215/5695640.pdf
    • http://sunlightsilverjewelry.com/uploads/1/3/0/2/130270937/1079574.pdf
    • https://wapudiwu.weebly.com/uploads/1/3/0/3/130379231/dedisuvujatola-duwipiwukari.pdf
    • http://millsacthelp.com/uploads/1/3/0/4/130483096/ramut_xibijera_sopuponix_vogag.pdf
    • http://planningprotocol2.com/uploads/1/3/0/3/130379354/tuxenut.pdf
    • http://terimox.audiostart59.icu/uploads/2020/01/29/toxovebufamibet-wokawukatiwoz-satonigar-mixon.pdf
    • http://bbcsalberta.com/uploads/1/3/0/5/130542831/e47479ec811.pdf
    • http://northwestuu.com/uploads/1/3/0/5/130590458/130590458.html#furosemide+in+pulmonary+oedema

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013fd.bin
dda124ef924598894a8ef294fbf612a47d9030046ebcf6422a82770cbfdd5f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD 8344 bytes

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