Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a94dc8960a5dca…

MALICIOUS

PDF

37.4 KB Authoring application: Pdftk
MD5: 316e891d7451a51fd49f1b997aea9f36 SHA-1: 8876c162f208072fa0f2e55392bc55c81a0172c5 SHA-256: b4a94dc8960a5dca420d988ea890e8afdee40da1a89287b033f98961d0e5fdf2
150 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded links to external PDF files hosted on various domains, indicative of a link farm or phishing campaign. The document body, though partially corrupted, mentions 'hernia inguinal' symptoms, suggesting a lure to disguise the malicious intent. The primary attack pattern involves directing users to a network of suspicious external URLs.

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://www.propiedadintelectual.services/uploads/1/3/0/6/130604618/7414303.pdf
    • http://drewmulligangolfouting.com/uploads/1/3/0/6/130603847/dfd5f1559b0c36.pdf
    • http://ns1.herothrillshow.org/uploads/1/3/0/8/130813531/gisefizopovuragev.pdf
    • http://theanxietyproject.org/uploads/1/3/0/6/130621273/5d54aa4a9954.pdf
    • http://www.melissaholdenart.com/uploads/1/3/0/2/130289002/1128809.pdf
    • http://computatumservices.net/uploads/1/3/0/6/130604031/mofiv.pdf
    • http://www.katehuntermusic.co.uk/uploads/1/3/0/5/130588839/1a8088b.pdf
    • http://jacksonholeskipackages.net/uploads/1/3/0/5/130590273/gujikuwipofodap.pdf
    • http://michaeldietze.net/uploads/1/3/0/6/130620547/b97fdd3e704bebe.pdf
    • http://bidpayfreight.com/uploads/1/3/0/6/130621495/lazuj-funomaj.pdf
    • http://www.jerryspcs.com/uploads/1/3/0/3/130323630/tipukiwo.pdf
    • http://www.gawint.com/uploads/1/3/0/2/130272094/9550025.pdf
    • http://structureandform.org/uploads/1/3/0/6/130604377/fedinere_tisurinil.pdf
    • http://snowbirdhomemanagementservices.net/uploads/1/3/0/2/130289686/wuzomadulituwititu.pdf
    • http://9lggiv.bdgct.com/uploads/1/3/0/8/130873869/130873869.html#primeros+sintomas+de+una+hernia+inguinal
    • http://bidpayfreight.com/uploads/1/3/0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003830.bin
f62bd212f549754446e0bfa79c730af4986d4d39cfa1059db4eb46c0949c3116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3830 8500 bytes

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