Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6d0b230c3b7b8e…

MALICIOUS

PDF

34.2 KB Authoring application: Smallpdf Desktop
MD5: 9b161c024e13a8f936063df2c18ad099 SHA-1: 4675dfb381bfa35678c26cda869618185e5fdab5 SHA-256: 4b6d0b230c3b7b8e5f07b559ec647ccec38db3c7362921f753b6b603767a559e
128 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, which are presented as download buttons. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further indicates a phishing or malicious redirection attempt. The embedded URLs likely lead to further malicious content or phishing pages.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mssciencefest.com/uploads/1/3/0/6/130639914/3029113.pdf
    • http://faboka.mbsmun.site/uploads/2020/01/28/genilixivofuxi.pdf
    • http://thecherigroves.com/uploads/1/3/0/5/130547486/nagodomadi.pdf
    • http://mycarenow.us/uploads/1/3/0/6/130620609/130620609.html#format+for+appointment+of+auditor+in+llp

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fed.bin
0f24b95cc84f288105c57821a5dcf4c9fc81b312a637b23e1e44b289c390e3e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED 8232 bytes

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