Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d43ccc3d2e4415…

MALICIOUS

PDF

41.5 KB Authoring application: LibreOffice
MD5: 3fbcb5721468c992485df4f8dbcb1c65 SHA-1: afbd8abe680f1fce0c2ac237071f58f5cf9fe9be SHA-256: c0d43ccc3d2e4415a6e3b5c8aaaa34f11ba822e7d0abee1b5f8dfab33d52fa63
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains, a technique commonly used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body itself is largely garbled but contains references to the linked URLs.

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://btimsp.com/uploads/1/3/0/5/130550657/buzepunufotuso.pdf
    • http://beemyhoneyapiary.com/uploads/1/3/0/4/130491063/5ab6aaa17.pdf
    • http://chanabarriger.com/uploads/1/3/0/2/130273983/83eb8da.pdf
    • http://beginningbosslife.com/uploads/1/3/0/7/130775279/7085544.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/7/130739059/130739059.html#font+color+html+code+chart

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001003.bin
6677ed19c6ca820327c69a526dc057666f624a292ae25ee76217ca391252592d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1003 7992 bytes
font_01_sfnt_off00005c33.bin
0c8b636322dcb4d69dd08a763b09c4b5ff2b7ea73056f43add13012560a79e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C33 16076 bytes

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