Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17cb38cf2bed195…

MALICIOUS

PDF

39.5 KB Authoring application: Nitro PDF
MD5: 9ea80e4b575d9b3e41a6287f2812a711 SHA-1: 78448ec38b7bc0b0b70a1da233d154a6d3a2287a SHA-256: b17cb38cf2bed1950ea3d6a79181c42e2224a75deaea534d819be79b5bbfd269
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The 'PDF_SEO_LINK_FARM' heuristic specifically identified a large number of external PDF links, suggesting a phishing or malware distribution scheme. The embedded URLs point to various PDF files hosted on different domains, likely serving as lures or redirects for malicious content. No scripts were extracted from this sample.

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://reannhuber.com/uploads/1/3/0/4/130488483/xovax.pdf
    • http://saratogacornercafe.us/uploads/1/3/0/6/130639621/tewazileveso.pdf
    • http://letsgreen.com/uploads/1/3/0/7/130776073/76177ba2efda40.pdf
    • http://myhappyeverydaylife.com/uploads/1/3/0/4/130489019/vatoniza_lolulez.pdf
    • http://cepar.org/uploads/1/3/0/2/130289651/babidawo-jubaxifagafud-nijodolimunup.pdf
    • http://oxe1.com/uploads/1/3/0/6/130639331/2aea031a5182.pdf
    • http://tintanegrahtx.com/uploads/1/3/0/7/130738650/f0dd4c6.pdf
    • http://gcmcare.com/uploads/1/3/0/3/130324370/bigoguwubakojeb.pdf
    • http://oaklandzendo.org/uploads/1/3/0/7/130739061/regedasumivuz.pdf
    • http://www.bsidesoflo.com/uploads/1/3/0/7/130739889/wavura.pdf
    • http://skylinesjewellery.com/uploads/1/3/0/4/130476229/5091416.pdf
    • http://www.katihollandart.com/uploads/1/3/0/2/130289265/vojikeror-jodobi-vowupufo-zavirebod.pdf
    • http://pheasanthillgardens.org/uploads/1/3/0/6/130603822/jixox_regugawi.pdf
    • http://mirembegirlsvocationalcentre.com/uploads/1/3/0/7/130776225/dibelozow.pdf
    • http://www.weddingsyourwaylakeville.com/uploads/1/3/0/5/130539758/5996331.pdf
    • http://charlesdickensjewelry.com/uploads/1/3/0/2/130289480/0b3e8c69362d9.pdf
    • http://chinese.genderinsanity.com/uploads/1/3/0/6/130605010/jelusuwew-tanozipumujonu-kurudati.pdf
    • http://mta-sts.ramageddon.com/uploads/1/3/0/6/130604180/nikizozebutufa_dosopujo.pdf
    • http://nomadic-chris.com/uploads/1/3/0/3/130323764/0d90154011c6.pdf
    • http://jtmetalprospect.com/uploads/1/3/0/6/130621111/129138.pdf
    • http://london-office-4.pleasingfood.com/uploads/1/3/0/6/130621385/130621385.html#difference+between+capitalism+and+socialism+and+islamic+economic+system

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c29.bin
92362049fee4d5a44597a34df3c879d6bed81a022b7e81aec20aaf88376e2f87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C29 7496 bytes

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