Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b5378f90bdcc35…

MALICIOUS

PDF

55.6 KB Authoring application: GIMP
MD5: e9e70acdc391ad2e7c29c5253c3ed547 SHA-1: 5e99edd5604daca8c636553173e336f1e2abe9c3 SHA-256: 11b5378f90bdcc35b64edbc8c7c09f6699dcc9c43043f77217a3632884be128c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily corrupted, contains references to 'Icd 10 bilateral shoulder pain' and mentions 'GIMP', suggesting a potential lure to disguise the malicious nature of the document. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or redirecting users to malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://myprettypalace.com/uploads/1/3/0/2/130270923/pazorop_vopetoxexojijo_golajesebino_xudusetafonozo.pdf
    • http://pyschicnetwork.live/uploads/1/3/0/6/130604803/7505694.pdf
    • http://londyn.letenky-sky.sk/uploads/1/3/0/7/130776069/tuxafudekunizi.pdf
    • http://sugarlandpremierroofing.com/uploads/1/3/0/6/130620480/08129ef4a190bd.pdf
    • http://thehnossaproject.com/uploads/1/3/0/6/130604650/zusedafemine.pdf
    • http://nobuhotelriyadh-fullsite.devsite-1.com/uploads/1/3/0/4/130483860/130483860.html#icd+10+bilateral+shoulder+pain
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010bc.bin
d478bb0dd8df9fe26837bfd49abf30ece02c7679a012e5cb847b92c8545bd7de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC 8136 bytes
font_01_sfnt_off00008ad8.bin
c6c28444bcd94379862b6cc7f8cfcdbcdaeb026857ccdb099d87626a561054a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD8 16092 bytes
font_02_sfnt_off00009f4d.bin
1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4D 2652 bytes

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