Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a49e6813a72f08…

MALICIOUS

PDF

43.3 KB Authoring application: Serif PagePlus
MD5: 238bf8b8372138ad22d5cb15d23435d1 SHA-1: 674691fcafe9f4a86c7db6081cf0b27b236a5246 SHA-256: 51a49e6813a72f08c6d018a264ac159bfd8f9025e213ab92fe5aaceb6aeac68c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm or redirection strategy. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly suggest malicious intent, likely phishing or traffic redirection. The document body, though partially corrupted, mentions 'Atividades sobre adverbios para 7 ano' and includes URLs, reinforcing the lure aspect.

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://jonathandavidsmith.com/uploads/1/3/0/5/130547038/3e5b887656.pdf
    • http://ngravinggifts.shop/uploads/1/3/0/5/130551210/liresizi-simazufosoruno-nibitos.pdf
    • http://rosslandry.com/uploads/1/3/0/3/130313470/0ad462bb91.pdf
    • http://drlesterleemd.com/uploads/1/3/0/6/130639396/3173432.pdf
    • http://mercerlanecollective.com/uploads/1/3/0/2/130289503/c972e30b.pdf
    • http://shardexplorers.com/uploads/1/3/0/7/130738794/130738794.html#atividades+sobre+adverbios+para+7+ano

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001140.bin
26807bb44c422116294f4211bae809e5f328264fc9ea2ea436504262587228fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1140 11152 bytes
font_01_sfnt_off0000625e.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 16268 bytes

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