Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7017df00e708cfc…

MALICIOUS

PDF

115.7 KB Authoring application: Smallpdf Desktop
MD5: c23a4312c71bf85e98b5d7d2d0672a1f SHA-1: 59f221d909eb94806ec81e1ee9741b3a438e8eda SHA-256: e7017df00e708cfc86ab04183496bb9f4a3bf2c419b144596a6b54ae45fdef6f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various external PDF files. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier strongly indicate malicious intent. The primary attack pattern involves directing users to a link farm, likely for SEO poisoning or to distribute further malware.

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://www.michaelbcimino.me/uploads/1/3/0/9/130969435/1280788.pdf
    • http://sandyburlesoneportfoliowfu.com/uploads/1/3/0/4/130476050/renalulosa_bumebeluj_suxav_vawolires.pdf
    • http://beavercrossministries.com/uploads/1/3/0/6/130639591/406a9238a0891c9.pdf
    • http://fmmshsguidance.net/uploads/1/3/0/3/130379528/fabax-walekurapasafam-zewilegig.pdf
    • http://naturalqueenstudios.com/uploads/1/3/0/6/130620561/nepaforobex.pdf
    • http://sbnewstv.com/uploads/1/3/0/6/130604010/lujunevazofimul.pdf
    • http://petemerzbacher.com/uploads/1/3/0/6/130640225/1559095.pdf
    • http://deadbikerssociety.org/uploads/1/3/0/6/130621983/8653851.pdf
    • http://compass-edu.com/uploads/1/3/0/4/130489240/6898378.pdf
    • http://riverglenwealthcounselors.com/uploads/1/3/0/7/130776864/kofivefededuve.pdf
    • http://www.wii-women-pilot.org/uploads/1/3/0/9/130969663/4827.pdf
    • http://www.jffrystevens.com/uploads/1/3/0/6/130639941/348664.pdf
    • http://ateaminspect.com/uploads/1/3/0/6/130621651/munituluze-fibupive-dakogapax-ligokukod.pdf
    • http://maezolv.com/uploads/1/3/0/3/130323538/84c6abb3b02cb.pdf
    • http://oregonfoodcarts.com/uploads/1/3/0/6/130604433/3b44a2be34c30.pdf
    • http://upini.com/uploads/1/3/0/5/130551114/5895919.pdf
    • http://www.nc956.com/uploads/1/3/0/2/130289327/443cd32d.pdf
    • http://adsl-63-204-18-20.benefitplans.org/uploads/1/3/0/6/130604654/130604654.html#first+law+of+thermodynamics+applied+to+isothermal+process
    • http://genderandconflict.gmu.edu/uploads/1/3/0/6/130620543/nepavadizogo.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002697.bin
3a60e98cff89606ddad063e4def8cb4ffe6dbe61cad32b78968f20078d248dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2697 10820 bytes
font_01_sfnt_off0000f578.bin
80398047ebfd0214373c8587c95fe06d458f29cd0615fa929aaa6778bac8f564		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF578 3824 bytes

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