Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb05bf6e2ace4a3…

MALICIOUS

PDF

58.3 KB Authoring application: PDFBox
MD5: a178532b0e1ecb716813b4c080114d36 SHA-1: 3a2fb9f5a78ff71f7afb39e4e7dcc0446e89e70e SHA-256: 8eb05bf6e2ace4a3502c43e8f8a34cd674f85eddeaeb0ca403a4a3910d880c46
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and an ML classifier returned a high maliciousness score. The document body contains a large number of embedded URLs, many of which point to PDF files on various domains. This indicates a link farm or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://18xx.fun/uploads/2020/01/29/70ca68dcf4d3845.pdf
    • http://lacasadelcocodrilo.org/uploads/1/3/0/5/130542935/surugol.pdf
    • http://zujari.hoex.ru/uploads/2020/01/27/7089534.pdf
    • http://harvestcityworship.com/uploads/1/3/0/6/130621261/890962.pdf
    • http://pon.motorolka.ru/uploads/2020/01/27/zewamoxu.pdf
    • http://wildcardreiningchallenge.com/uploads/1/3/0/3/130313436/juvatijebofobi.pdf
    • http://missstacymckee.weebly.com/uploads/1/3/0/2/130270892/fukoxajuwiwizekav.pdf
    • http://mixbotanicals.com/uploads/1/3/0/2/130289719/walema_nikugokoxur.pdf
    • http://pro-cosmetic.guru/uploads/2020/01/27/9084169.pdf
    • https://kitodonexom.weebly.com/uploads/1/3/0/6/130603771/bedizurewuvipexuseka.pdf
    • http://pag.bsvwordwidetravel.com/uploads/2020/01/28/5102833.pdf
    • http://site111.ru/uploads/2020/01/27/2e5252cf4.pdf
    • http://christinalozanofier.com/uploads/1/3/0/5/130551319/migugogalusugavere.pdf
    • http://biztriage.com/uploads/1/3/0/3/130313700/vamifafadazuxu.pdf
    • http://tunedinteacher.com/uploads/1/3/0/3/130379711/namikiwifuzoviroxo.pdf
    • http://uniteamericabrand.com/uploads/1/3/0/3/130323295/xivolareje.pdf
    • https://kepizopinugivum.weebly.com/uploads/1/3/0/3/130379377/sitinawaw-vanowadesug-wijoga-tujofaleg.pdf
    • https://madaratakedoxi.weebly.com/uploads/1/3/0/5/130543141/2596497.pdf
    • http://konogaj.jitoli.icu/uploads/2020/01/28/samajukasibepuvoj.pdf
    • http://tressieschneider.com/uploads/1/3/0/5/130545882/0dffd7a.pdf
    • http://kateyanne.com/uploads/1/3/0/6/130603941/4269133.pdf
    • http://cfthomas.com/uploads/1/3/0/6/130620520/130620520.html#acute+cholangitis+tokyo+guidelines+%E0%B9%84%E0%B8%97%E0%B8%A2

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001171.bin
2887ede8c3b1e757cca6ee4482029122f76c4f1481146cb6b041aacc77b599e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1171 8304 bytes
font_01_sfnt_off00009337.bin
a98ea1ab65533aa5a8d930a9ecda3240c4afa5cda94bda55fcb893fdfae47903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9337 2892 bytes
font_02_sfnt_off00009cea.bin
7fe1fae3eb606ecf70ce1844952c87a92cabdde7833a12d4888caf6aba42d80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEA 9732 bytes

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