Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab3ba0de5855b16…

MALICIOUS

PDF

39.4 KB Authoring application: Nitro PDF
MD5: 804a72b84458a0419da3588f1919d047 SHA-1: 7bd550e683bad62c383bdb390ad1219a6f128926 SHA-256: 5ab3ba0de5855b16c1e095d42f55690c921329d3132496516d2a8ae5db62b0f2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs pointing to external PDF documents, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a tactic to manipulate search engine results or distribute a large volume of content, potentially malicious. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing or malware.

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://audicionamericas.com/uploads/1/3/0/5/130543045/9382301.pdf
    • https://sibabose.weebly.com/uploads/1/3/0/5/130589442/4431094.pdf
    • http://theywill2.ca/uploads/1/3/0/6/130604279/1079435.pdf
    • http://brianne4housewv.com/uploads/1/3/0/6/130621363/2019851.pdf
    • http://suesessentiallife.com/uploads/1/3/0/6/130640053/88a35143fad60e8.pdf
    • http://newmillerdam.org/uploads/1/3/0/5/130539072/wonubaxe.pdf
    • http://mozellemain.weebly.com/uploads/1/3/0/4/130478433/soxakujomixofibefozi.pdf
    • http://gejuxex.fluger.icu/uploads/2020/01/28/5523719.pdf
    • http://bezan.toysrobocar.ru/uploads/2020/01/29/847f72.pdf
    • http://reviteskincare.com/uploads/1/3/0/6/130621464/pumazewuw_fominaka.pdf
    • http://nanubaxi.kamdom.ru/uploads/2020/01/28/buvuvizeji-rupafepik.pdf
    • http://dmedansky.com/uploads/1/3/0/6/130621191/19a799fc3483e37.pdf
    • http://myshermer.net/uploads/1/3/0/4/130477613/rojape-wipomim-xiwexexubok.pdf
    • http://woodlandstuition.com/uploads/1/3/0/5/130542728/130542728.html#badminton+rules+and+regulations+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014f5.bin
0526f50e4b60aa9acbaad1d8ebdaf594bd1b925a20573e8da247accfed6a6b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5 8028 bytes

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