Malicious PDF — malware analysis report

Static analysis result for SHA-256 622a169490e09b19…

MALICIOUS

PDF

51.0 KB Authoring application: PDFedit
MD5: d60299b7cb4cb7c247b532035d8c9d22 SHA-1: 39d3bbba67344dbfbdd73e95ddbf6873925b0896 SHA-256: 622a169490e09b19b379f0a20e799f2392f7a4f2e7f2d897fbc0eb94441abd32
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains and are structured to appear as SEO-optimized content. This technique is commonly used to drive traffic to malicious websites, potentially for phishing or malware distribution. The ClamAV detection and ML classifier further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gayporn.onl/uploads/1/3/0/7/130776070/582293.pdf
    • http://m28yachting.com/uploads/1/3/0/6/130621374/ribetu.pdf
    • http://countthesteps.com/uploads/1/3/0/6/130604205/5442307.pdf
    • http://mail.wremac.com/uploads/1/3/0/6/130639583/6d213e0eda3.pdf
    • http://rightmovecolorado.com/uploads/1/3/0/7/130739344/pimop_xoxodatusi_geseted_wolirerisuvol.pdf
    • http://www.bayandiye.com/uploads/1/3/0/7/130776033/f53205971d9.pdf
    • http://www.oberhofferfamily.com/uploads/1/3/0/8/130814633/rimufitidufi-biwiwekesir-wixelukepu-podaxapu.pdf
    • http://mck.choiceplex.com/uploads/1/3/0/6/130620345/3596279.pdf
    • http://velocityproxies.com/uploads/1/3/0/7/130776043/5762586.pdf
    • http://arcityofrefuge.com/uploads/1/3/0/7/130775683/fenanimereket.pdf
    • http://sales13-sip-phone.pleasingfood.com/uploads/1/3/0/8/130874613/130874613.html#ascites+ultrasound+appearance
    • https://doi.org/10.1148/96.1.15AbstractUltrasound
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055dc.bin
1dedf2a01f55206504a2e8788301d42f2032b92da6732daf52bb3c93669c7e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DC 16328 bytes
font_01_sfnt_off00006ef2.bin
b932be3c6e93c41dc035292c1cfb9d656a87a5f12aaf12d991cb35820f97eeda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF2 9708 bytes

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