Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec79dbf5c0243d30…

MALICIOUS

PDF

42.9 KB Authoring application: Scribus
MD5: 270d83a56b788639533a00e161aa5d8e SHA-1: 0029ded478cb7850c06860bcef5873b11803475e SHA-256: ec79dbf5c0243d30a3cb3bf15896a54664f9d675094a4db298608cf92ce294f5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 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 hosted on various domains. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm its malicious nature. The embedded URLs suggest a phishing or malware distribution campaign, where the user is likely enticed to click through to malicious content.

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://thanksvember.com/uploads/1/3/0/2/130270914/6dc12b1.pdf
    • http://delucaconsulting.se/uploads/1/3/0/5/130540021/xetugefabirug-wafarilur.pdf
    • http://neilestrick.com/uploads/1/3/0/7/130739284/6dc9ba420cbf2ad.pdf
    • http://ged.mos-kazan.ru/uploads/2020/01/28/9966316.pdf
    • http://sekolahberpikirindonesia.com/uploads/1/3/0/5/130542852/8924943.pdf
    • http://priyadevalia.com/uploads/1/3/0/6/130603743/e3758c5c3.pdf
    • http://davidmarquesibanez.com/uploads/1/3/0/8/130814161/130814161.html#weekly+calendar+with+hours+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010c4.bin
17bc5d25740e6fa0f9d9b4e4e371fc61c8fa5fe00ee5ace2e2213f9aa6247938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4 8820 bytes

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