Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44a87ba002bba46…

MALICIOUS

PDF

39.8 KB Authoring application: Serif PagePlus
MD5: 1e608c2798e460a6334db6a3207d0f27 SHA-1: 175da48dc699a219e6c948d2ec208b8661d88ec3 SHA-256: e44a87ba002bba46019957e8f6fe7d52368bb3160c4509d42c8d025c7bfa021c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing or traffic redirection. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of a mass external PDF link farm, with the primary domain being nrvikingspiritwear.com.

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://nrvikingspiritwear.com/uploads/1/3/0/2/130289530/6289760.pdf
    • http://systecaiml.com/uploads/1/3/0/5/130589147/032887b2090b017.pdf
    • http://lugabotoli.rennessans.com/uploads/2020/01/27/pijiferakax.pdf
    • http://kenabbott.net/uploads/1/3/0/5/130551941/bowanifoduzawa_fititaforisi.pdf
    • http://mobilityeco.it/uploads/1/3/0/6/130604834/9526839.pdf
    • http://mysunshinerides.com/uploads/1/3/0/6/130621457/7476283.pdf
    • http://semulig.7x4.ru/uploads/2020/01/27/jutepodelaroteza.pdf
    • http://plattsburghfarmerscraftersmarket.weebly.com/uploads/1/3/0/5/130590261/fesirobikusudajevo.pdf
    • http://my4health.com/uploads/1/3/0/6/130604768/8149798.pdf
    • http://vegetablejewelry.com/uploads/1/3/0/6/130639342/daletovupo.pdf
    • http://nahwahlacrosse.com/uploads/1/3/0/2/130289313/6661822.pdf
    • http://mygraceboutique.com/uploads/1/3/0/4/130478067/ee4dfd22142b.pdf
    • http://g4b.ru/uploads/2020/01/27/lukoderuge.pdf
    • http://zuto.x-qual.com/uploads/2020/01/27/6949430.pdf
    • http://blackcatsculpture.com/uploads/1/3/0/6/130621451/9056244.pdf
    • http://kenboyerphotography.com/uploads/1/3/0/4/130435725/dopisabekikisan.pdf
    • http://naturesworks.net/uploads/1/3/0/2/130287842/bijupenapabajij.pdf
    • http://centerofpeacefulendeavors.com/uploads/1/3/0/2/130273799/130273799.html#spider+man+2019+imdb+parents+guide

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014ac.bin
b2cfb7ba5359fd0b50af31cbdc957585ae1537f6ce32ba2ab9b7edf6d0738f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC 8688 bytes

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