Malicious PDF — malware analysis report

Static analysis result for SHA-256 729cb9422acd1b96…

MALICIOUS

PDF

39.2 KB Authoring application: Smallpdf Desktop
MD5: 95d4d80954897e3ca4388717499d70d5 SHA-1: a3872a35893fbf71fe9264a425ffb3f6bda12772 SHA-256: 729cb9422acd1b96859c1dea179520237f5007f970e0492e3a0a58bb6f60c35e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics, including a critical alert for a large number of external links, suggesting a link farm designed to redirect users. The ML classifier and ClamAV also identified it as malicious. The embedded URLs likely lead to further malicious content or phishing sites.

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://checksymptom.com/uploads/1/3/0/7/130774973/dekageza_nagudi.pdf
    • http://radul.net/uploads/1/3/0/6/130621857/842cd52e1.pdf
    • http://whiskeygirlsd.com/uploads/1/3/0/6/130603955/gajojusejomopigozow.pdf
    • http://nailsbyrose.nl/uploads/1/3/0/6/130621457/9978607.pdf
    • http://lfsgd.maraludwig.com/uploads/1/3/0/5/130589158/jawis.pdf
    • http://brushscription.com/uploads/1/3/0/6/130621576/gujujiramereku.pdf
    • http://europimec.org/uploads/1/3/0/7/130776291/ganutufamobewo.pdf
    • http://www.viktorsgang.com/uploads/1/3/0/7/130738506/ragov.pdf
    • http://toneboxdigital.com/uploads/1/3/0/4/130476502/6a05b669566.pdf
    • http://inlandsoul.com/uploads/1/3/0/7/130740391/dbae4485dc.pdf
    • http://22ninthstreetu707.com/uploads/1/3/0/4/130490585/6e1ede7f61b.pdf
    • http://northwesternexecutivemedicine.net/uploads/1/3/0/3/130313458/6453455.pdf
    • http://guardioesdeluz.com/uploads/1/3/0/4/130477287/wuvoxe_xenezafesorila.pdf
    • http://familyrvadventures.com/uploads/1/3/0/5/130589412/489202.pdf
    • http://rawk-cbd.net/uploads/1/3/0/5/130542934/jekej.pdf
    • http://linuxteleprompter.net/uploads/1/3/0/6/130620538/9702877.pdf
    • http://mnsportslocker.com/uploads/1/3/0/2/130270902/9879123.pdf
    • http://charliemcmanus.com/uploads/1/3/0/3/130313590/vozose.pdf
    • http://jingcaijiangjin.br3h.com/uploads/1/3/0/7/130740200/130740200.html#ielts+14+test+3+reading+passage+3

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003b5a.bin
9dbd9353ec41e029f396664168dc21d3ecdf7022bb2e5dc1dc17f4a03e7db58a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B5A 8252 bytes

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