Malicious PDF — malware analysis report

Static analysis result for SHA-256 7039c9c7f2400293…

MALICIOUS

PDF

50.8 KB Authoring application: Serif PagePlus
MD5: cf3375d4eb25363eae4471356b464894 SHA-1: 115e3c12954dfa64cd8a481e49bc4e83d9e7cb6a SHA-256: 7039c9c7f240029378c41f8e14eb69d4fe83b5653d0a0fb87aa56d8581dc517e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files across various domains, indicating a link farm or content distribution network. This behavior is flagged by heuristics as malicious and is consistent with SEO manipulation or the distribution of further malicious payloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://coinspacespain.com/uploads/1/3/0/5/130550859/8858668.pdf
    • http://alissajacobscmt.com/uploads/1/3/0/5/130539450/3699960.pdf
    • http://adriftwoodworks.com/uploads/1/3/0/2/130272932/1869974.pdf
    • http://stringsoil.com/uploads/1/3/0/5/130543368/abc93e.pdf
    • http://algaebookandpaper.com/uploads/1/3/0/4/130488888/b1cb0b.pdf
    • http://notein-between.com/uploads/1/3/0/6/130621305/dubej.pdf
    • http://1017autosales.com/uploads/1/3/0/5/130541837/8317502.pdf
    • http://100wwclickingcounty.org/uploads/1/3/0/5/130589442/bf2e0f0a7621.pdf
    • http://christusvictorlutheranchurch.org/uploads/1/3/0/5/130589246/5951717.pdf
    • http://feputesol.bikerpublic.com/uploads/2020/01/29/feporamiw-xusazukot.pdf
    • http://zambiasafarihunting.com/uploads/1/3/0/6/130639538/130639538.html#garritan+aria+player+download
    • 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_off00001280.bin
61de250b093e147a40058086be82f4a72f882f9ae328c8f3cf29f36e9c0f3100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1280 8928 bytes
font_01_sfnt_off00008120.bin
ddc6c38a5929b263b215a5b0c7aa8b1a409f146866f06980111f9f21a6232bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8120 16036 bytes

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