Malicious PDF — malware analysis report

Static analysis result for SHA-256 18bf2f5bc934a9bf…

MALICIOUS

PDF

38.6 KB Authoring application: SWFTools
MD5: d5473bed77095d7396e6771744a1937f SHA-1: 6045c7bc5f377279954b2b51dbfa83a391cb7181 SHA-256: 18bf2f5bc934a9bf6e349e89e15280e479f41710a019ac4e3711ff4ea2aa58e2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with critical heuristics indicating a PDF link farm. The document body contains numerous embedded URLs pointing to external PDF files across various domains. These URLs are likely used to distribute further malicious content or engage in SEO poisoning.

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://tjscatering44.com/uploads/1/3/0/5/130589230/kawodedenenan.pdf
    • http://ivpallet.ru/uploads/2020/01/27/kalerepitob.pdf
    • http://students2019.us/uploads/1/3/0/6/130621068/runapezenevitudotat.pdf
    • http://xip.ssberprizee.info/uploads/2020/01/28/5478720.pdf
    • https://subidajuguxax.weebly.com/uploads/1/3/0/5/130589180/benosi.pdf
    • http://tammykjohnson.com/uploads/1/3/0/2/130272364/venitatalejagakeg.pdf
    • https://turufevi.weebly.com/uploads/1/3/0/3/130380084/3666810.pdf
    • http://noworries-caretakers.com/uploads/1/3/0/3/130324416/89ee0d261601ae.pdf
    • http://cryptopress.pro/uploads/2020/01/27/lipalewovofojo.pdf
    • http://wefir.vera-72.ru/uploads/2020/01/27/juvivivete.pdf
    • http://ketamefo.etalonclinica.ru/uploads/2020/01/28/d176d32b54c3.pdf
    • http://asociacionperiodistaspr.org/uploads/1/3/0/5/130551164/130551164.html#gastroenteritis+in+pregnancy+icd+10+code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001295.bin
23ee9e82d6430cda42aea524836e3ea39bb7c14dfd456eb53998b22009f7b6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1295 7752 bytes

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