Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d28b207ca48fdd4…

MALICIOUS

PDF

41.1 KB Authoring application: OpenOffice Draw
MD5: aefe0fc51d25f18e7a3f0769bf1488f6 SHA-1: 41d2840feabe6cbdf004934a9ae955fdf07511b2 SHA-256: 9d28b207ca48fdd4e1af06275c3435afc79c386635344559bb0f684117c91acd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing and potentially automated traffic generation. The embedded URLs are the primary indicators of compromise, likely serving as lures for further malicious downloads.

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://citizensmedicare.org/uploads/1/3/0/4/130436272/1165688.pdf
    • http://ppa-m.com/uploads/1/3/0/6/130621051/9d021c7e30.pdf
    • http://sugarpaso.com/uploads/1/3/0/6/130604207/xaxawudilelop.pdf
    • http://mysticgardentw.com/uploads/1/3/0/6/130621730/jevanijinovama-girefivaz.pdf
    • http://movinion.com/uploads/1/3/0/2/130270963/119ded057.pdf
    • http://oakmountainfirewood.com/uploads/1/3/0/6/130604045/xiferan.pdf
    • http://mtrageserllc.com/uploads/1/3/0/6/130622080/guruziruguvudedu.pdf
    • http://us.momotombochocolatefactory.com/uploads/1/3/0/6/130621441/130621441.html#js+ajax+form+submit

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000124d.bin
eb444ca0094014d2366404b8995005a5387c7597889d4875d859ba57ee26f1e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124D 8808 bytes
font_01_sfnt_off00005a3b.bin
0c8b636322dcb4d69dd08a763b09c4b5ff2b7ea73056f43add13012560a79e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3B 16076 bytes

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