Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7db9ba8cafebf7c…

MALICIOUS

PDF

36.5 KB Authoring application: QPDF
MD5: a348f0c57ada0dcc4ec0c3adc1693c65 SHA-1: a09bbd6dbefd4b6981975e52c795146f03f449e4 SHA-256: f7db9ba8cafebf7caf3d1d28b9ff6429281b0293125ec3a32d3916c9f5065b37
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF file contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, while containing text about 'Abc letters worksheet', also embeds these numerous links, suggesting a deceptive lure.

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://minisheepadoodlepuppies.com/uploads/1/3/0/5/130551132/nexixovi.pdf
    • http://mytutoringgroup.com/uploads/1/3/0/5/130551623/ponun_tumadobe_wiwefedulus.pdf
    • http://carrouselmuseum.net/uploads/1/3/0/5/130590195/govizow.pdf
    • http://dromedariosmagicos.com/uploads/1/3/0/6/130604815/c601aca67e2dd.pdf
    • http://mengdid.com/uploads/1/3/0/5/130539840/puwurepales_difunubawegili_duvevuxetalego.pdf
    • http://midiklorians.com/uploads/1/3/0/5/130590384/kaparuzup.pdf
    • http://web2marc.com/uploads/1/3/0/3/130379474/b487266575.pdf
    • http://jackpassion.net/uploads/1/3/0/4/130476150/zuxetelebozesuw_kugegikuvewageg_noverivunilun.pdf
    • http://cakzglamdepo.com/uploads/1/3/0/5/130590403/130590403.html#abc+letters+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011dc.bin
2372ed3f59c54c26714d3aaf125586cf1e628311dcbc2ee87ecf4f72e61a9dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC 8316 bytes

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