Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15d5830b8505bce…

MALICIOUS

PDF

66.1 KB Authoring application: PDF Studio
MD5: f86f25b323898e4310661057911039ec SHA-1: 4465f6943916c1f2c5ce6948af3808e5c8e3a1a1 SHA-256: d15d5830b8505bce76d080d26a277854fd0e3cf92806c5789d0c70f344eefe0e
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The critical PDF_SEO_LINK_FARM heuristic indicates the presence of numerous embedded external links, with the primary domain being newbraunfelsmasonry.com. The embedded URLs suggest a link farm or redirection scheme, likely intended to lead users to malicious content or phishing sites.

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://newbraunfelsmasonry.com/uploads/1/3/0/8/130814761/9691672.pdf
    • http://lumibymari.net/uploads/1/3/0/3/130379769/wofurikovesesalet.pdf
    • http://yogibudssa.com/uploads/1/3/0/5/130590456/5de2de5de028.pdf
    • http://campprepare.com/uploads/1/3/0/5/130539926/vebumeme_kofevitiwumaso.pdf
    • http://mail.arrowsmithchurch.com/uploads/1/3/0/4/130435985/ac6c14fe4.pdf
    • http://ateliermarcantoine.com/uploads/1/3/0/6/130639767/38630.pdf
    • http://technicolordesign.net/uploads/1/3/0/7/130738971/kanokopujova.pdf
    • http://teshekpuklake.com/uploads/1/3/0/6/130620940/620839.pdf
    • http://mike4congress.com/uploads/1/3/0/4/130436190/9397043.pdf
    • http://lisamsnyderedd.com/uploads/1/3/0/7/130776096/rijomififepuxar_sotaxizipof.pdf
    • http://villasvitao.com/uploads/1/3/0/5/130550986/6237676.pdf
    • http://navkettanagriculture.com/uploads/1/3/0/6/130604810/rexubodew_wulelunib.pdf
    • http://redneckfest.org/uploads/1/3/0/6/130621248/duganajedu.pdf
    • http://root.920meats.com/uploads/1/3/0/7/130776811/3366a788331.pdf
    • http://socialmediaflux.com/uploads/1/3/0/6/130640051/perudi.pdf
    • http://a1629462xstreamtravel.xsideas.com/uploads/1/3/0/3/130323251/130323251.html#classification+of+antihypertensive+drugs+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000146d.bin
16c2ae307c090ce4d09ce3cce201dc63abac2e904f4380e7929c002891e343ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146D 8968 bytes
font_01_sfnt_off0000c777.bin
c048ac4ed90d63bfae46472f65f9cf6fc0bd5e75369f2d8f28771a6d96a2731c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC777 3156 bytes

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