Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd55ffffbf80651…

MALICIOUS

PDF

35.1 KB Authoring application: GIMP
MD5: e8f7d037a323ad6d37e5afacd1d9f7b0 SHA-1: 3a5fae81889b10ad21a3e8d8e8278550d74f656c SHA-256: 4bd55ffffbf80651fb817edc1663590d4333948ed38528ea126c6c1071c4f978
130 Risk Score

Malware Insights

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

The PDF file contains a link farm with multiple embedded URLs, suggesting an attempt to direct users to malicious content. The ClamAV detection and the presence of a 'download button' heuristic further indicate a phishing or malware distribution attempt. The document body itself is heavily corrupted, but the presence of URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a malicious intent to redirect users to external resources.

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 https://bugasibekepusep.weebly.com/uploads/1/3/0/4/130488316/lupukonetafuwewix.pdf
    • http://northamericapolechampionship.com/uploads/1/3/0/6/130621523/giril.pdf
    • http://storewolf.com/uploads/1/3/0/6/130639924/1536177.pdf
    • https://pubolujakef.weebly.com/uploads/1/3/0/5/130551823/fifiwamek.pdf
    • http://zake.best-of-world.ru/uploads/2020/01/29/sumufudizilofinibaxa.pdf
    • https://xafejunetewosuz.weebly.com/uploads/1/3/0/3/130379332/936276.pdf
    • http://stokesed508webpage.com/uploads/1/3/0/5/130588508/130588508.html#printable+clock+faces+without+hands+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001143.bin
a86bc38c9f77f02261861b05b8af531ca7d34cf4d705ed0afaeb1316d8abc4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1143 8328 bytes

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