Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c087b7f154e026…

MALICIOUS

PDF

46.9 KB Authoring application: ImageMagick
MD5: 4b5826c6ff26ea94dd77118d8078fdb1 SHA-1: fc9fadc588c031abe75090757c085317f91d5a26 SHA-256: 70c087b7f154e02650702bdd4eba6c5f1ccb7b791777ab2ce4b6eb379b67d5e2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it acts as a gateway to further malicious 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://sweetwillowsoap.com/uploads/1/3/0/6/130604056/1542461.pdf
    • https://fadenewenolum.weebly.com/uploads/1/3/0/6/130603931/5982579.pdf
    • http://besthairreplacementnc.com/uploads/1/3/0/3/130313582/f7eca71b8.pdf
    • http://taranakitimebank.nz/uploads/1/3/0/4/130436050/612ab91a8a6c99d.pdf
    • http://towizu.anomalija.com/uploads/2020/01/29/861e1bdc10d6e.pdf
    • http://ekcoelearningcommons.com/uploads/1/3/0/6/130604414/piwejosuxejegig-sutinopibuviku-jeferak-jimula.pdf
    • http://michaelgierl.com/uploads/1/3/0/2/130288320/a9f9cb4.pdf
    • http://taiguantravel.com/uploads/1/3/0/3/130323208/reseduxarusabop.pdf
    • http://silverliningssociety.com/uploads/1/3/0/3/130379371/d4bd2d967ee0.pdf
    • https://lupexorulogi.weebly.com/uploads/1/3/0/2/130270808/700beeb5.pdf
    • http://tovuxiwur.aviakompanija.ru/uploads/2020/01/28/zulofufimexagapomixo.pdf
    • https://suzajofov.weebly.com/uploads/1/3/0/5/130546415/427373.pdf
    • http://tcsonline.net/uploads/1/3/0/6/130639698/130639698.html#virmire+mass+effect

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001326.bin
159bcba058d8c3e4e5cbd6656ab1758e5510e149c15457ebd50bfc5514e21de9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1326 7704 bytes

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