Malicious PDF — malware analysis report

Static analysis result for SHA-256 7711cf4b7763b55c…

MALICIOUS

PDF

35.8 KB Authoring application: GIMP
MD5: ed781a8da4fc0b4ef4b0ca93607d2023 SHA-1: 01a5ac7130df359ba176aba5dc4372364a4ba91a SHA-256: 7711cf4b7763b55c7d8563760ef33cc73baa5723d3b0814bee80488415b84c4b
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 external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to potentially harmful content.

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://carolinaboardandbowl.com/uploads/1/3/0/2/130273735/bigiz.pdf
    • http://street-retail.com/uploads/2020/01/28/c0a7f2017b34.pdf
    • http://factor-neuro.com/uploads/2020/01/28/5478775.pdf
    • https://wowusogotobepik.weebly.com/uploads/1/3/0/5/130590140/zexavetebotewewotu.pdf
    • http://riveralexander.com/uploads/1/3/0/6/130604090/mininokedenozot.pdf
    • http://richbassviolin.com/uploads/1/3/0/6/130639027/tiseg.pdf
    • http://servicedogsal.com/uploads/1/3/0/5/130589171/2fa6dee9.pdf
    • http://cathyhepworth.com/uploads/1/3/0/6/130621405/1a6b05.pdf
    • http://mudgleyholidayhouse.com/uploads/1/3/0/4/130489567/kenomesogifupekufat.pdf
    • http://bernardobellostudio.com/uploads/1/3/0/6/130604127/130604127.html#vision+de+mundo+y+literatura
    • 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_off000011cc.bin
df67bee60271a28b29ac22a71efa940e6c62ab494e2e7d144f2c4db58afd7a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC 8180 bytes
font_01_sfnt_off00004539.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4539 16036 bytes

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