Malicious PDF — malware analysis report

Static analysis result for SHA-256 761a01106acc082f…

MALICIOUS

PDF

46.8 KB Authoring application: pdf-parser
MD5: b102195200f888710cafc939007c6a05 SHA-1: a69e20bdb66922f81693209d32aba4d8915c3575 SHA-256: 761a01106acc082fe64692c3134da2fe89b2b8b1e17e3c9d17157fd0a4afce17
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 manipulation or distributing malicious content. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' and a high ML classifier score further indicate malicious intent. While no scripts were explicitly extracted, the structure suggests a phishing or content distribution vector, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://synapse-productions.com/uploads/1/3/0/6/130604666/9398487.pdf
    • http://lixi.tdorestoran.ru/uploads/2020/01/28/3610490.pdf
    • http://longislandoverheaddoors.net/uploads/1/3/0/7/130740558/e31152457b08.pdf
    • http://coratoloassociatesllc.com/uploads/1/3/0/4/130435751/7558574.pdf
    • http://oraclereadings.com/uploads/1/3/0/6/130621610/7ca70d81a32d644.pdf
    • http://buildersblitzcapecod.org/uploads/1/3/0/5/130588419/1668739.pdf
    • http://o2smallhouses.com/uploads/1/3/0/3/130313002/pamagomonon-fixiluk-karuxuxab-pawar.pdf
    • http://kacihollingsworth.com/uploads/1/3/0/6/130620871/51e0ba.pdf
    • http://delightyourspirit.com/uploads/1/3/0/5/130546118/2806ceadc4f1.pdf
    • http://newperspectivemedical.com/uploads/1/3/0/2/130292179/130292179.html#animal+characteristics+worksheets+for+first+grade
    • 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_off00001409.bin
c9a63b44010d704e614b2f49247a64070128b6bd2bc5fb69e9b99e0d49b52bf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1409 8052 bytes
font_01_sfnt_off000069d5.bin
0a19d3ec01c2bd5f2da2e654894ff9caac3df97291af1acb5ff150be3e6b34cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D5 18100 bytes

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