Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef564331ba563e6b…

MALICIOUS

PDF

60.5 KB Authoring application: Nitro PDF
MD5: a5d16c201b8eb358485517b5a0ad6e28 SHA-1: 67ab2fba1a3bfe0b65f0fc81defb30012aa1bd6f SHA-256: ef564331ba563e6bf14cad2f56440f5e8b64e66956b5e41162bfc2dd9e632ed4
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a link farm and a ClamAV detection for phishing. The embedded document body, though partially corrupted, contains references to scientific papers, suggesting a lure to disguise malicious intent. The primary attack pattern involves a large number of external PDF links, likely designed to redirect users to malicious 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://sofiafabiano.com/uploads/1/3/0/4/130476747/vonisagavotiserugu.pdf
    • http://nati-artist.com/uploads/1/3/0/7/130738597/55045c.pdf
    • http://midicicr.com/uploads/1/3/0/6/130604169/rumaze.pdf
    • http://nailsbyrose.nl/uploads/1/3/0/7/130776385/xevukap.pdf
    • http://craigkiselbach.com/uploads/1/3/0/2/130289173/likitajor.pdf
    • http://voirin-bourgault.com/uploads/1/3/0/2/130270874/6082333.pdf
    • http://bodymindandsport.club/uploads/1/3/0/6/130605161/ae79e8bc5a1ac7.pdf
    • http://markrharris.com/uploads/1/3/0/4/130435702/lenofew.pdf
    • http://curateamoment.org/uploads/1/3/0/5/130551253/zurobumeniv_dijigojere_sezodavisodem_fusutagonirus.pdf
    • http://goldsboroeyedoctor.com/uploads/1/3/0/4/130478663/nasemuxobejegami.pdf
    • http://baconkale.com/uploads/1/3/0/5/130543868/4526569.pdf
    • http://slowventures.net/uploads/1/3/0/2/130273791/1774008.pdf
    • http://glendalepress.com/uploads/1/3/0/2/130289693/megupamen_genatib_ligedejafag_manuxoboko.pdf
    • http://dailysteed.com/uploads/1/3/0/7/130740255/lowimakodafazevonika.pdf
    • http://httpsecurityscan.com/uploads/1/3/0/4/130489122/betejuzigo-jejufizupu-fimivukibixu-wumafidofikawo.pdf
    • http://microsoft-office-365.online/uploads/1/3/0/6/130604193/538365.pdf
    • http://0fyq5.bpmtc.com/uploads/1/3/0/6/130620987/lebuzixexovilez_rofuxevekuzexe_puzixe.pdf
    • http://stevenmwalsh.com/uploads/1/3/0/7/130738780/rebuvadagikiw.pdf
    • http://nuenlist-holzkunst.ch/uploads/1/3/0/4/130483132/wikaxodaz_megofak.pdf
    • http://believersjourney.net/uploads/1/3/0/5/130588445/8433353.pdf
    • http://www.oceansexperiment.com/uploads/1/3/0/3/130313345/130313345.html#isolation+of+lactic+acid+bacteria+with+probiotic+potential+from+camel+milk

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001517.bin
36728ac9617c99ce28bf3e117bba19fce744bbc925e6f06e7ef3debcf2c85539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1517 9284 bytes
font_01_sfnt_off0000acd8.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACD8 2864 bytes

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