Malicious PDF — malware analysis report

Static analysis result for SHA-256 da13b571e69db9d4…

MALICIOUS

PDF

39.1 KB Authoring application: GIMP
MD5: 348d30886520247a1a39df188bc9b7b0 SHA-1: 618a24b309b97c25eb5d824013e8574dbb2cae51 SHA-256: da13b571e69db9d444859e0e381c5788f5d065aeb1733e989250c4fcd6d1da25
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to other PDF files, indicating a link farm or distribution mechanism. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The document body, though partially corrupted, contains references to an 'ofsted report' and includes URLs, reinforcing the lure. The primary attack pattern involves redirecting users to a multitude of external PDF resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://listerpartyrental.com/uploads/1/3/0/6/130604195/90671c3cc0.pdf
    • http://xuzowa.voloklinik.com/uploads/2020/01/28/5541240.pdf
    • http://alexandermgmtnyc.com/uploads/1/3/0/2/130289554/maferigo-wudogoto-vakatamufaga-safofotugoket.pdf
    • http://adriantobin.com/uploads/1/3/0/6/130604392/zujubedojo-kojajilexadut-gavedepofar.pdf
    • http://kootenaycured.com/uploads/1/3/0/3/130323422/wokos_kavavelipubux.pdf
    • http://onelegchallenge.org/uploads/1/3/0/4/130483902/00a8c1768.pdf
    • http://northernlightscoaching.net/uploads/1/3/0/2/130288720/vobuzafas.pdf
    • http://mirandasanderson.com.au/uploads/1/3/0/2/130289735/e1bb23ff7.pdf
    • http://ladywithaharpniagara.com/uploads/1/3/0/3/130313468/6601842.pdf
    • http://buzap.lesnayazastava.ru/uploads/2020/01/28/67813a95.pdf
    • http://usanewbiology.com/uploads/1/3/0/6/130620981/nidebodobozinad-wubokuraligudas-tawesar.pdf
    • http://diablopepperfarm.com/uploads/1/3/0/4/130483238/xixajelapepedopetiva.pdf
    • https://moruxiligijin.weebly.com/uploads/1/3/0/4/130489072/5196988.pdf
    • http://xokerasazu.pay-pass.pro/uploads/2020/01/29/6775327d5ffb75.pdf
    • http://dovix.musc-media.xyz/uploads/2020/01/27/eb0a9b6.pdf
    • http://smithhaist.com/uploads/1/3/0/4/130483632/9222358.pdf
    • http://kunatasej.sally-girl.pw/uploads/2020/01/27/6316027.pdf
    • http://xenov.penostroy.com/uploads/2020/01/27/1299018.pdf
    • http://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/5/130539597/130539597.html#clarendon+school+ashford+ofsted+report

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001585.bin
226a8bbcf9d84cf77edf4a5344ad9d9e8267be45b9a85cc695cc7ebdbef57999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1585 8272 bytes

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