Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b01bd08f5f45257…

MALICIOUS

PDF

40.5 KB Authoring application: Nitro PDF
MD5: 545654957195271d390375548f95ab8a SHA-1: a52bb596b800bca3bf86839a8a2de9e6714fdb57 SHA-256: 6b01bd08f5f452577981c9065ea203ac069e73a54b4bdadeb2021743bda899e4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier further support its malicious nature. The document body, though partially corrupted, contains references to recipes and identity, potentially serving as a lure to disguise the malicious link farm.

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://remont-msk4.icu/uploads/2020/01/28/tokemegamomaxora.pdf
    • http://thelazyrussian.com/uploads/1/3/0/2/130271124/wobitisaxuvikata.pdf
    • http://pitsoulis-lift.gr/uploads/1/3/0/4/130476743/7477554.pdf
    • http://sfchampions.com/uploads/1/3/0/4/130436071/5956828.pdf
    • http://jvpartners.net/uploads/1/3/0/5/130590464/tuzew-wojiliz-zititesarimop-nemunodob.pdf
    • http://amyroby.weebly.com/uploads/1/3/0/6/130621895/pewegepipedol.pdf
    • http://darcyrylander.com/uploads/1/3/0/5/130539265/jusiw.pdf
    • http://juliejesternewman.com/uploads/1/3/0/5/130588231/130588231.html#al+sabor+del+chef+oropeza+recetas+de
    • 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_off0000119c.bin
d0b1d66d229a6fb3dadc23308cef60ba37cf0d7c81f1bc505d388a597a3d9830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119C 9352 bytes
font_01_sfnt_off000056b9.bin
d12e1945699adc080c3e2f49a2c45ee9a70cbb178c18d882f92367fcd923f800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B9 16396 bytes

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