Malicious PDF — malware analysis report

Static analysis result for SHA-256 650f1ac73096e77a…

MALICIOUS

PDF

48.2 KB Authoring application: Poppler-utils
MD5: e12b868de13e8b50dcc538490eecf73a SHA-1: 73bfbd2e9e79f897ad85b493b5890bc8fba80fcb SHA-256: 650f1ac73096e77afad6b70ce11053f2c41557b58e4a2ae70e8b6770ecd519ac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary finding is a large number of embedded URLs pointing to external PDF files, suggesting a link farm or a distribution mechanism for further malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific 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://innovision-uk.com/uploads/1/3/0/7/130775643/4588328.pdf
    • http://merakiofferings.com/uploads/1/3/0/6/130605497/2154e64052.pdf
    • http://ristorantepizzeriacasamatta.com/uploads/1/3/0/8/130813528/vajuxobukomuvuk_malel_gireje.pdf
    • http://faberjaneeggs.com/uploads/1/3/0/7/130739261/1627699.pdf
    • http://sexopty.com/uploads/1/3/0/6/130603710/c901175e5.pdf
    • http://www.grantlady.com/uploads/1/3/0/5/130539840/ladofapas_pozilijofem.pdf
    • http://mentorhood.com.hk/uploads/1/3/0/7/130740458/golinijib.pdf
    • http://zofe.fr/uploads/1/3/0/3/130379243/kovabavejusurajawes.pdf
    • http://rogersbellappleiphonereadreceiptssamsung.com/uploads/1/3/0/5/130588740/deee69b1ff25.pdf
    • http://victoriacastrovip.com/uploads/1/3/0/4/130435745/eb8b6.pdf
    • http://robziman.com/uploads/1/3/0/4/130483879/a8444a.pdf
    • http://gallierealty.com/uploads/1/3/0/3/130313686/79cff780ea333.pdf
    • http://royalspadegarden.com/uploads/1/3/0/6/130604530/130604530.html#chronic+pancreatitis+normal+amylase
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004262.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4262 2600 bytes
font_01_sfnt_off00004af0.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF0 16036 bytes
font_02_sfnt_off00006257.bin
e0857d61935ee98ae30d8b063a79ee3358d6fa2ea3ead39fa8f4f768ae0dc769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6257 8692 bytes

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