Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8d7094f5723e19…

MALICIOUS

PDF

58.0 KB Authoring application: LibreOffice Draw
MD5: 5b59043824b78f1d394cbd5b1ea165db SHA-1: b015ccbe775bcda0d6c0561d3066d9cef50fe484 SHA-256: 2a8d7094f5723e19bbe8f36089ff1e66a608fd404966e7e2c9e5ed494ce547d6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external websites, a technique commonly used for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior, indicating a link farm designed to attract traffic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports the malicious nature of the document. The document body, while containing some seemingly legitimate text about biology worksheets, also includes these malicious links.

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://madwellkale.com/uploads/1/3/0/5/130551728/f48b3c.pdf
    • http://alphachiomegaofoaklandcounty.org/uploads/1/3/0/2/130289278/6668822.pdf
    • http://binda-narine.com/uploads/1/3/0/5/130538818/6827d9eff7ae046.pdf
    • http://donnace.studio/uploads/1/3/0/6/130620952/jasaxinomara.pdf
    • http://drpatty.net/uploads/1/3/0/4/130436171/130436171.html#100+greatest+discoveries+in+biology+worksheet+answers

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000108d.bin
35eecae79fa69518a7da43041b1c111f2bc2fbc2b5c01f4890338e66d5bcd3f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108D 8576 bytes
font_01_sfnt_off00006742.bin
8f13e583911256f90b68e3038e2425c8bd33d3f5becff93466e5ce8b51fa0ebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 7028 bytes
font_02_sfnt_off00007902.bin
f6697e512318185cffbafdf94c00e59efb149c64b6a5c5256271263542c89fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7902 18180 bytes
font_03_sfnt_off00009251.bin
736cd2d33175a5a13ef050b14347fdc238d98c9b1a4a011ca05e63a00a87de6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9251 1556 bytes
font_04_sfnt_off000099c4.bin
f8e3eb5de180309ac9276b1663882b47f5533fa144f0e8b762054ff312f83c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C4 4288 bytes
font_05_sfnt_off0000a6fd.bin
c66de6c739f7ec46f9d6e525674994d2658400730b9a877748a6643f20d92723		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FD 2956 bytes

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