Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb97733b94322b26…

MALICIOUS

PDF

80.2 KB Authoring application: OpenOffice.org
MD5: fc3649e754eba3ccb4a11d867a529d99 SHA-1: 45ea12bccca83c217e1914350df4806baeea82ce SHA-256: cb97733b94322b2601ee972074597b076667e5f86d57bcc46cbdc90b91b24df8
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 URLs pointing to external PDF documents 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 and ClamAV detection. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bassimasonry.ca/uploads/1/3/0/5/130544257/6351177.pdf
    • http://liviace.me/uploads/1/3/0/4/130488812/4345581.pdf
    • http://power101jamz.net/uploads/1/3/0/7/130739778/ae903858a.pdf
    • http://brandgrenade.com/uploads/1/3/0/5/130544635/2382014.pdf
    • http://www.theheartonfire.com/uploads/1/3/0/7/130740489/dudor-rajer-fovuburakipuzo-javomewaluwujok.pdf
    • http://dananinkuyrugu.com/uploads/1/3/0/7/130738786/1362968.pdf
    • http://arvr.nyc/uploads/1/3/0/7/130776646/sodol.pdf
    • http://mijaliscogrill2.com/uploads/1/3/0/6/130620919/23a004858edbc.pdf
    • http://www.jarvisebenezer.ca/uploads/1/3/0/2/130270796/fitabetubi.pdf
    • http://visitscope.com/uploads/1/3/0/3/130323411/kulanezazovu.pdf
    • http://reliefforsudan.com/uploads/1/3/0/6/130604536/6a15eb5ede42d34.pdf
    • http://chihuahuafrentealcambioclimatico.com/uploads/1/3/0/5/130550994/kopamudebala.pdf
    • http://alumcanyonediting.org/uploads/1/3/0/7/130738830/lunivuvoden.pdf
    • http://lanwanwireless.net/uploads/1/3/0/7/130775448/kejikimefagorozokira.pdf
    • http://jb4jb.salon225.com/uploads/1/3/0/4/130488114/130488114.html#ganga+action+plan+phase+2+states

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000224f.bin
f961b6ceacc65a2765641c4c44ad57cffd7da3b98a460029d098a9a2a107e071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x224F 9668 bytes
font_01_sfnt_off0000ec61.bin
039eb517683f72f61dd0034fa7b674560945d672ceb980a8efeb1a36c13cdd0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 16168 bytes
font_02_sfnt_off00010136.bin
2c32c498f23db3cae400dac070c72b38d41a5d5dbe5041cbe08e7cee44e1acfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 2648 bytes

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