Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fd5ba72b0a6e98…

MALICIOUS

PDF

62.8 KB Authoring application: Karbon
MD5: 7bb75fd4d88112b2c0bc6b78459fda51 SHA-1: 2da755bf993334168b5a788b2dfe6f77fb3d1b86 SHA-256: 77fd5ba72b0a6e98d45105ac604095f6e26885a835c3bc751ae4301f1c928617
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a high ML classifier score further indicate malicious intent. The document body is heavily obfuscated and contains a URL that mirrors one of the embedded links, reinforcing the malicious redirection pattern.

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://impactgoaltending.net/uploads/1/3/0/7/130739234/zutofonisudofaxefar.pdf
    • http://squaretaper.info/uploads/1/3/0/5/130550724/9c50ef7d.pdf
    • http://darcyneils.com/uploads/1/3/0/5/130538990/1615853.pdf
    • http://hey-pretty.com/uploads/1/3/0/7/130776174/4361949.pdf
    • http://www.lymetavern.com/uploads/1/3/0/4/130476359/41f82c.pdf
    • http://deitzlandsurveying.com/uploads/1/3/0/6/130621836/3411524.pdf
    • http://superluminary.net/uploads/1/3/0/4/130483140/2370566.pdf
    • http://my-genuine-life.com/uploads/1/3/0/8/130874026/sijufujunewofi.pdf
    • http://misskatskinks.com/uploads/1/3/0/2/130291350/furamobekigobewo.pdf
    • http://wd-consult.com/uploads/1/3/0/5/130589047/7266499.pdf
    • http://www.loganscup.com/uploads/1/3/0/8/130814591/d09ddae6ad.pdf
    • http://mountainhighs.net/uploads/1/3/0/7/130776394/puvefizex.pdf
    • http://tolisbistro.com/uploads/1/3/0/7/130775269/kabog.pdf
    • http://tuesdays4.com/uploads/1/3/0/5/130550706/6020284.pdf
    • http://www.lahomedeco.tw/uploads/1/3/0/5/130588574/sinokal_fozerulozedenuv_ruwev.pdf
    • http://dentaltherapyforarizona.com/uploads/1/3/0/4/130476814/godapakasop_genesubog_jopotutafekef.pdf
    • http://cqe8.brdge.org/uploads/1/3/0/5/130544067/130544067.html#kkmoon+airbrush+kit
    • 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
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000108d.bin
0b1b1cfbd31bf22ccae1dbad632cdc98fb0a8d58fa847e5014ef3095e8399b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108D 8776 bytes
font_01_sfnt_off00008b5a.bin
07c516cdc08eef3f778a7dc9fd54f01f9b991574b335e110c175a8004d253187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5A 3020 bytes
font_02_sfnt_off0000954c.bin
b195ba776360337e0c8847a1f70ebf7e776628c0b6b62df72d82cae76b96cbf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x954C 16248 bytes
font_03_sfnt_off0000aa38.bin
eaa4dde51fd04d4db8dc223d97e5e1aeb2070941b7c144db1acc557f645d9ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA38 4184 bytes

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