Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a07a4a7a37f4612…

MALICIOUS

PDF

38.9 KB Authoring application: OpenOffice.org
MD5: a9f64b121ebecae60902636234e5693d SHA-1: c96b72a580f7f2fd78ba3bf7e8d987c2c9903f51 SHA-256: 5a07a4a7a37f4612e33a0c8af19016acb2fb2188ba65a841faa0acebc834fc84
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, suggesting the document is part of a campaign to redirect users to malicious content.

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://csbcorner.com/uploads/1/3/0/5/130552097/09142d2b6ac7.pdf
    • http://sturminsternewtonplan.com/uploads/1/3/0/3/130323374/1661888.pdf
    • http://mastergamecraft.com/uploads/1/3/0/5/130540146/sejobubavawazaj.pdf
    • http://tafojuja.rbc-crypto.ru/uploads/2020/01/27/niruse.pdf
    • https://mobitexexed.weebly.com/uploads/1/3/0/6/130604288/gipodales.pdf
    • http://dessante.com/uploads/1/3/0/2/130291676/rarov-bofadigu.pdf
    • https://paxutefow.weebly.com/uploads/1/3/0/4/130475955/vonomevef.pdf
    • http://zos.opop777.icu/uploads/2020/01/29/wosugifu-duropepados.pdf
    • http://protoolsbaseball.com/uploads/1/3/0/6/130620948/1869651.pdf
    • http://misbailes.com/uploads/1/3/0/5/130589287/130589287.html#mathswatch+answers+dividing+fractions

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001250.bin
e00e4cc5eeee803b3f3bdd5c5b83b33531187f8cc88eb091e6b9e280c38ae911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1250 9272 bytes

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