Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e40a70f64d7645d…

MALICIOUS

PDF

127.4 KB Authoring application: OpenOffice Draw
MD5: 461fb83196b986cb530acd3616641bb9 SHA-1: 97887f4b5d2f71e412d3535b203f1bf247cfa186 SHA-256: 7e40a70f64d7645d0f42f06b629e8da15e1b1b1277c441b3fc21a6c46b0f9611
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the sheer volume of external links suggests a distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://schmittsanimalhospital.net/uploads/1/3/0/4/130435688/8180016.pdf
    • https://wupalefepotekuv.weebly.com/uploads/1/3/0/4/130436441/jisezimepituros-dotul.pdf
    • http://detectiveholmes.com/uploads/1/3/0/7/130776589/cc65a48c2a12905.pdf
    • http://middleclassmusings.com/uploads/1/3/0/4/130491757/e481ec71cc.pdf
    • http://stagesphere.com/uploads/1/3/0/3/130313507/abe9bbac.pdf
    • http://naturallysport.net/uploads/1/3/0/4/130435766/b97203c6.pdf
    • http://staceyjanedouglas.com/uploads/1/3/0/2/130291471/1383022.pdf
    • http://studiocitynorth.com/uploads/1/3/0/5/130550744/6502289.pdf
    • http://juliejesternewman.com/uploads/1/3/0/4/130476024/130476024.html#is+reformed+theology+the+same+as+calvinism
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001394.bin
c0edbea04b01bb1ee75eebc77ae638ed92e07abb422da334293df8c9d3d2be04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1394 10400 bytes
font_01_sfnt_off0001241a.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1241A 16036 bytes

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