Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dcad3fa7d3cca22…

MALICIOUS

PDF

37.6 KB Authoring application: Pdftk
MD5: c7256dffe16f19d303c77c368bcf21f8 SHA-1: b3065d4115cf5d969cf4a6c0dda2ecc3421901f6 SHA-256: 4dcad3fa7d3cca22b2c212615579b3ef764f133b32db84e0ce10e9176d00a965
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Aflac client services' and 'Wellness Benefit Claim', suggesting a phishing or scam 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://myuptownhealth.com/uploads/1/3/0/5/130589090/a3ee00d.pdf
    • http://theforagedfern.com/uploads/1/3/0/6/130639471/7944731.pdf
    • http://nordicin.net/uploads/1/3/0/6/130639573/5595101.pdf
    • http://mymontagne.com/uploads/1/3/0/5/130589305/f9846.pdf
    • http://camp720.com/uploads/1/3/0/2/130291441/2141327.pdf
    • http://proseandcommas.org/uploads/1/3/0/7/130775762/8839527.pdf
    • http://pandlexpressinc.com/uploads/1/3/0/6/130620375/4430330.pdf
    • http://winstonsmushface.com/uploads/1/3/0/2/130289161/2426078.pdf
    • http://wheelhouse.theater/uploads/1/3/0/3/130313093/zeniveka_dokivesomot.pdf
    • http://islamic-global.net/uploads/1/3/0/4/130435938/gatasagi.pdf
    • http://elliotwellnessindustries.com/uploads/1/3/0/2/130272571/kogesuzodasu.pdf
    • http://nomoreheroesnovel.com/uploads/1/3/0/6/130620990/ac2e66bd.pdf
    • http://mccarterfam.com/uploads/1/3/0/5/130589218/c7a7e57b7.pdf
    • http://nicolitulk.com.au/uploads/1/3/0/3/130323957/130323957.html#aflac+client+services+fax+number

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a48.bin
43dea8dd6da366d4793d2486596332325c46bdef6bfd1c2c916462ea33f903e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A48 7980 bytes

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