Malicious PDF — malware analysis report

Static analysis result for SHA-256 189c960ea7b29c35…

MALICIOUS

PDF

82.8 KB Authoring application: Inkscape
MD5: b2b0039524b24e96d673131926dc3302 SHA-1: 432c8edbd6e21d0354286ca47f5397fc0b06a4b0 SHA-256: 189c960ea7b29c35ecc58e195806f1ce57dc992825bd7f07ef97115a3945d84d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, embedding a large number of external URLs that point to other PDF documents. This technique is often used to artificially inflate search engine rankings or to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://wendtauto.com/uploads/1/3/0/2/130270831/b98edb.pdf
    • http://mnlifecoach.com/uploads/1/3/0/6/130604193/296a1119.pdf
    • http://7272oldtown.com/uploads/1/3/0/6/130620390/kudoxoserapidogafasu.pdf
    • http://barricas.nl/uploads/1/3/0/6/130621490/zupufujopi_xazina.pdf
    • http://necroscape.com/uploads/1/3/0/3/130313241/509f960a9c1d.pdf
    • http://babywhoopsie.com/uploads/1/3/0/6/130640163/gazemezikoreji.pdf
    • http://bossy-sculpture.com/uploads/1/3/0/6/130604449/1796871.pdf
    • http://undiscoveredactress.com/uploads/1/3/0/6/130604631/masew_poxovotimaki_badiwelosekor_wadofi.pdf
    • https://zijezarunar.weebly.com/uploads/1/3/0/4/130488969/vefososepuriv.pdf
    • http://bartolomeilaw.com/uploads/1/3/0/6/130604894/130604894.html#c%C3%A1ch+t%C3%ADnh+irr+b%E1%BA%B1ng+m%C3%A1y+t%C3%ADnh+fx+500ms
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015a6.bin
3e8cb7c8332a822e64a299e08c7e6a3f788b0ee575ca40c0fe70a51432e62e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6 12920 bytes
font_01_sfnt_off0000e840.bin
996b3f6051f3f90430e6bc1bd38d8f0d4d4da92991363bb59f196c2ebb0e625b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 2948 bytes
font_02_sfnt_off0000f477.bin
4ed4ddb2f6e3ac5a17ed0082bc3529c7f828266f80b065dd6415303d0cf6d41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 26228 bytes

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