Malicious PDF — malware analysis report

Static analysis result for SHA-256 7483715ccb615a65…

MALICIOUS

PDF

40.9 KB Authoring application: LibreOffice Draw
MD5: 1cd9ece9a382f8274a11e330f6ddd9f4 SHA-1: f0729c9d7229399b3f7b1a5b7e2b56c3257523e2 SHA-256: 7483715ccb615a6502e96fde734d8a20120e335cbb6b05bcc55d376fb968c8c2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains a large number of embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, while containing some seemingly legitimate text about accounting software, also embeds multiple malicious URLs, suggesting a phishing or malware distribution lure.

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://navatalu.punish-me-for.fun/uploads/2020/01/29/9444067.pdf
    • http://charlottesvilleostomysupport.com/uploads/1/3/0/2/130287394/wijowusuworazalat.pdf
    • http://youngisraelnmb.org/uploads/1/3/0/3/130313564/lasej.pdf
    • http://eskdalefalconry.co.uk/uploads/1/3/0/2/130271131/8694682.pdf
    • http://paitmencomp.com/uploads/1/3/0/4/130476605/2393495.pdf
    • http://bootcampbasel.com/uploads/1/3/0/7/130775626/69e1383c.pdf
    • http://sweetestdreams.org/uploads/1/3/0/6/130620947/130620947.html#rcm+full+form+in+tally
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010f6.bin
ffa14791eac5d25d8c373e37635cbbb44681bf2bf46109fff1aa2865cdbdf858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6 8212 bytes
font_01_sfnt_off000057e8.bin
228e00de66c0ff5a9c2cc93bd598911bf5ac884d912fa43373252cbaade4e334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E8 8476 bytes

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