Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b33657271bbb8f5…

MALICIOUS

PDF

54.5 KB Authoring application: Inkscape
MD5: 9fe977c763f343f419050295abf109db SHA-1: f9fdbe544828e20a0743db830724fe63238791eb SHA-256: 6b33657271bbb8f5da005db69972b5b6a8f6c126f6675e4780d42d793e4b5534
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains, suggesting a link farm for SEO or malicious redirection. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though partially corrupted, mentions 'Yandex browser free for windows 7' and includes URLs that likely lead to further malicious content or phishing attempts.

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 https://fuduzomuxanexi.weebly.com/uploads/1/3/0/4/130483539/bezaduxovod-lerutovigopive-wobaf.pdf
    • http://naturalmusicmarketing.net/uploads/1/3/0/2/130271137/bd478b992a4b.pdf
    • http://panduanpaidmember.weebly.com/uploads/1/3/0/5/130590416/muviwuserixe-simotetopir-zezegurox.pdf
    • http://lubbockministry.com/uploads/1/3/0/6/130621000/milakudujilesi_dulenexebukovu.pdf
    • http://thesharpetraveler.com/uploads/1/3/0/5/130589279/bexexusoni.pdf
    • http://nickmosca.com/uploads/1/3/0/7/130739500/menovedutamebe-rapufoliliw-jikazas.pdf
    • http://rosadad.svetofot.ru/uploads/2020/01/28/ae5f11b222c234a.pdf
    • http://pas.infonetacademy.tech/uploads/2020/01/28/gevovejijak.pdf
    • http://mychinesewatch.com/uploads/1/3/0/6/130605175/130605175.html#yandex+browser+free++for+windows+7
    • 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_off00001236.bin
e68b64d29a9e2426b7c875404a06520676e232346bcb7c7756a0161e227a82bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1236 7892 bytes
font_01_sfnt_off000086bc.bin
3c303dc7acfdadef03da2d9a36f031dc6d451d8c71853b03eb843470ad22e190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BC 19232 bytes

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