Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5f9983169c0c22…

MALICIOUS

PDF

33.5 KB Authoring application: SWFTools
MD5: d227bc386106ae9eb60d50945a67cf37 SHA-1: 0d9ade03281d97d7dea252c08e035e344cf66a92 SHA-256: ef5f9983169c0c22bc0114c3379d5f72864df8e9554139ae705ac2bdc1162b11
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection further support its malicious nature. The document body itself appears to be corrupted or contains obfuscated text related to road construction, which is likely a lure.

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://ninjasrs.com/uploads/1/3/0/2/130273617/2656347.pdf
    • http://musicwithjojo.com/uploads/1/3/0/6/130604562/wevopibonibubarejave.pdf
    • http://foosballguys.com/uploads/1/3/0/6/130603835/ratuwonomiko.pdf
    • http://burgerbattle.net/uploads/1/3/0/5/130589006/fotakoza.pdf
    • http://nekomimilisa.com/uploads/1/3/0/6/130604703/sofijusa.pdf
    • http://5thousandcleaningservices.ca/uploads/1/3/0/5/130539279/sekubo_dumizekimumam.pdf
    • http://4phs.com/uploads/1/3/0/4/130483239/wosawamiledud.pdf
    • http://totland-creative.com/uploads/1/3/0/8/130874426/tagutilikuxepu.pdf
    • http://p-mad.com/uploads/1/3/0/5/130544386/pemaz.pdf
    • http://desatascosterrassa.com/uploads/1/3/0/7/130775321/2242413.pdf
    • http://circusla.com/uploads/1/3/0/5/130589126/toxogevuma_xugazevezamuzul_givapum.pdf
    • http://ponoleadership.com/uploads/1/3/0/6/130620874/61bcc478.pdf
    • http://bemytutor.org/uploads/1/3/0/6/130621912/matid-tebadapododi.pdf
    • http://supremespeech.com/uploads/1/3/0/7/130775474/a2eed.pdf
    • http://51j6tc.bdgct.com/uploads/1/3/0/6/130604140/130604140.html#bitumen+road+construction+procedure

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ba4.bin
29f23ea7161414dd323895499c85d1e81f26a36eb729c79f0f1517a99da017e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA4 7088 bytes

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