Malicious PDF — malware analysis report

Static analysis result for SHA-256 5059ab8b8d2ea473…

MALICIOUS

PDF

39.0 KB Authoring application: GIMP
MD5: e5f3ac929e47a0b5d318eb2ae5753729 SHA-1: 8133b27a96dbabf74fda439dfbac4f7f73132948 SHA-256: 5059ab8b8d2ea473dcac267da1840200a64afe1522e20095354b982522318336
152 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, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. No scripts were extracted, but the sheer volume of external links suggests a delivery mechanism for further compromise.

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://restorationexpeditions.com/uploads/1/3/0/6/130604805/zonako.pdf
    • http://yamayogacollective.com/uploads/1/3/0/4/130488696/91459.pdf
    • http://perfilelearning.net/uploads/1/3/0/5/130588363/856526382.pdf
    • http://onefootinfront.com/uploads/1/3/0/4/130435774/6d1d0ad8cec1.pdf
    • http://capehomerepair.com/uploads/1/3/0/6/130620417/917024.pdf
    • http://catavision2030.org/uploads/1/3/0/7/130776253/jibapor-mozido-tixubuzokuxo-nugevijikokuvi.pdf
    • http://bookbop.com/uploads/1/3/0/6/130603809/5905830.pdf
    • http://zacharyares.com/uploads/1/3/0/2/130291908/6ff342c628.pdf
    • http://midnightepiphany.org/uploads/1/3/0/5/130551586/merifu_derenevijubawor_rizenokevu.pdf
    • http://oddballdigital.com/uploads/1/3/0/4/130489727/zasolasagiz-gejuxoletebugim-xopefozexaj.pdf
    • http://nuvisionconstruction.com/uploads/1/3/0/6/130639131/sopuxuwukixokinotezo.pdf
    • http://nixology.com/uploads/1/3/0/6/130620366/0241c34b.pdf
    • http://mrsboucher.com/uploads/1/3/0/3/130313436/masevawosom-jipokakivi-babuz-xopiwuxegob.pdf
    • http://suncitycenterhomes.com/uploads/1/3/0/7/130738591/pomifo.pdf
    • http://kurzyhs.info/uploads/1/3/0/7/130740610/nanoririline.pdf
    • http://taiyangchengmsc33.br3h.com/uploads/1/3/0/4/130435962/130435962.html#cbse+grade+8+maths+textbook+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c60.bin
9c1efe33b3a0a397bef7780bb01d264f9e061e42437b3f654cf2e812b02b3632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C60 8364 bytes

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