Malicious PDF — malware analysis report

Static analysis result for SHA-256 4277ccaf6a0fd78b…

MALICIOUS

PDF

36.8 KB Authoring application: OpenOffice Draw
MD5: 9b90446149d8d453a2336e1f27f28b53 SHA-1: 138bad148715101657395342d26bc4034a76271f SHA-256: 4277ccaf6a0fd78b35aad818110e24b0168a724069161ed95d187ef530138774
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded external links to PDF files hosted on various domains. This suggests a link farm or a distribution mechanism for further malicious content, potentially for SEO manipulation or phishing. No scripts were extracted from this sample.

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://mercatorglobalenterprises.com/uploads/1/3/0/3/130323750/3721542.pdf
    • http://nitratodargento.com/uploads/1/3/0/6/130620912/zumininojir_gepevazodu.pdf
    • http://kabe.7x4.ru/uploads/2020/01/29/0f47cc.pdf
    • http://operationbarefootfreedom.com/uploads/1/3/0/2/130292125/muvefesuw.pdf
    • http://nutricionbasadaentrofologia.com/uploads/1/3/0/5/130551331/66cc2161a00f5.pdf
    • http://progenic.co.nz/uploads/1/3/0/5/130546977/9175354.pdf
    • http://kylaconner.com/uploads/1/3/0/6/130620283/130620283.html#jurassic+park+tamil+movie++tamilrockers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e7.bin
6c1be2841e52ca9d2519a01df8168e08201b45b8fbb4f4b85ffc383355bcf9a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7 8484 bytes

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