Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b82f0486f68907…

MALICIOUS

PDF

48.6 KB Authoring application: LibreOffice
MD5: f9b2e029afe9e47e8b7f37af099298e2 SHA-1: 5e28f18f30b47b4db17ad66d241b5578f30659c1 SHA-256: c8b82f0486f68907d7484fdebcd1f1b7005bb524176546474499d23a40f0a1aa
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://shopwasilclothing.com/uploads/1/3/0/2/130271004/6641768.pdf
    • http://urbnmnky.ca/uploads/1/3/0/5/130588999/tukivoponanotuv.pdf
    • http://powertech-international.com/uploads/1/3/0/7/130739113/5076856.pdf
    • http://healthyearsformula.com/uploads/1/3/0/4/130435672/zowepurexaterazilade.pdf
    • http://xxxcrew.com/uploads/1/3/0/7/130739827/1208f55186028.pdf
    • http://michaelcaruso.net/uploads/1/3/0/4/130477455/3727607.pdf
    • http://rossioriginalsphotography.com/uploads/1/3/0/4/130488469/1f5c061c3deb2.pdf
    • http://olandesina.net/uploads/1/3/0/8/130813416/ladumomo-lavejunabuxi-mesuratazuwa.pdf
    • http://albertarescue.com/uploads/1/3/0/8/130813831/0a91aa4bb.pdf
    • http://living-2-dye.com/uploads/1/3/0/2/130289346/nojesinimanedo.pdf
    • http://www.silverstoneacademy.com/uploads/1/3/0/7/130739185/7b39a.pdf
    • http://whyagileteamsfail.com/uploads/1/3/0/5/130551567/130551567.html#membranous+glomerulonephritis+relapse+treatment

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006654.bin
ad969ae8b391f6df2d6824e9010b2a20a55b8fa5b3472e8b5694e904927510fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 9180 bytes

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