Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f41b20ea0d2187f…

MALICIOUS

PDF

37.9 KB Authoring application: Karbon
MD5: 32cd0b568043b3bc85e3c9b49cc2fdae SHA-1: 93643fad5cc563e90e2a3b1d0982f17688be20ac SHA-256: 7f41b20ea0d2187f4af5d6b2d673ef5730595885afd2f6928cf41b079201d336
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm designed to distribute malicious content or conduct phishing attacks. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports the phishing and malicious intent. No scripts were extracted, but the structure and heuristics strongly suggest a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://strawberrygoosephotography.com/uploads/1/3/0/3/130313271/pusufez.pdf
    • http://puz.crimeacadastre.ru/uploads/2020/01/29/mupizebokuni.pdf
    • http://masterlibrary-staging.com/uploads/1/3/0/4/130476359/1777263.pdf
    • http://bawun.evanstonfcu.com/uploads/2020/01/27/875857.pdf
    • https://karijufube.weebly.com/uploads/1/3/0/4/130476079/2729256.pdf
    • http://portbreton.com/uploads/2020/01/27/balufasimunuri.pdf
    • http://tecladomusicinstitute.com/uploads/1/3/0/3/130313150/130313150.html#lal+chunariya+full+song

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010a7.bin
39c16cb01d1f112ea403f9bcc8ee16f7b46ad7fdfe924f851a322e6b40bdcac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7 7916 bytes
font_01_sfnt_off00004f00.bin
6ab1cd4d17ab349fbdd09211a36a2a1dc4518bd4dc087255357134f3c7815bc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F00 2860 bytes
font_02_sfnt_off0000585e.bin
ea06ecb031d4451bda1c735f45ffcc7ae8c2727a548f4de40ad6c49faff177a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585E 2028 bytes

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