Malicious PDF — malware analysis report

Static analysis result for SHA-256 837b6e159a68c969…

MALICIOUS

PDF

37.6 KB Authoring application: Mobipocket Creator
MD5: f8399e573edb697d12de135cd8f370a6 SHA-1: af48d608727ebbe45001730fa3aa356ff9fdc2b3 SHA-256: 837b6e159a68c9698eec84dc401c27f0da78a360348320a4aba29e5c2ec54c23
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing attempt. It contains a large number of embedded URLs, forming a link farm, which are likely used to redirect users to malicious sites. The presence of these numerous external links strongly suggests an attempt to lure victims into visiting potentially harmful content.

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://damngoodgolf.com/uploads/1/3/0/2/130289679/takisonapomos-rigumomut-timawolokebuli.pdf
    • http://drashmani.com/uploads/1/3/0/5/130588579/berixawuwevugafazo.pdf
    • http://pumawebdev.ca/uploads/1/3/0/3/130324289/36ffd.pdf
    • http://geigersound.com/uploads/1/3/0/7/130775543/8d70f7c0.pdf
    • http://ujcdsgn.com/uploads/1/3/0/2/130272280/fb8599c62c.pdf
    • http://onlineestateagentz.com/uploads/1/3/0/4/130436272/busufifivuf.pdf
    • http://okrsouz.ru/uploads/2020/01/28/wetagejapuwub.pdf
    • http://midlandsallstar.com/uploads/1/3/0/6/130640225/416f0bf2fcec2c.pdf
    • http://comicatcreations.com/uploads/1/3/0/4/130488198/1870496.pdf
    • http://newmillerdam.org/uploads/1/3/0/4/130476273/tobaxi.pdf
    • http://planaustral.com/uploads/1/3/0/4/130489128/7334819.pdf
    • http://tcsonline.net/uploads/1/3/0/4/130483376/130483376.html#happy+birthday+papa+song++mr+jatt

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000128b.bin
b626195966d399a4b7f26f792c418366d2f432943c33508a6bd44263653d65d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128B 8016 bytes

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