Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15230216ab61d6a…

MALICIOUS

PDF

39.3 KB Authoring application: Poppler-utils
MD5: ad8612cc58c6a6ecc829e8755dae3763 SHA-1: 91ba1384c9cbab8ccccf75e2d10b6c0e5d3d9a05 SHA-256: a15230216ab61d6ae3cf744f236445690a616e1a4746285b0c7b16bc6763a069
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged by multiple heuristics, including a critical finding for a link farm and ClamAV detection as phishing malware. The ML classifier also strongly indicated maliciousness. The document body contains garbled text, but the embedded URLs point to a large number of external PDF files hosted on various domains, suggesting a coordinated effort for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample.

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://ntagent.com/uploads/1/3/0/8/130813063/nagisevosavi-jogivad-neratevoluwexi-natan.pdf
    • http://ncmns.net/uploads/1/3/0/5/130588943/a7feaa8bb66088d.pdf
    • http://saulmendozaphoto.com/uploads/1/3/0/6/130620509/gopozapaz.pdf
    • http://mrsneuville.com/uploads/1/3/0/2/130270895/niramofe.pdf
    • http://adentamexico.com/uploads/1/3/0/5/130546486/tunejegajagog_vefetu_fiwedikop.pdf
    • http://ka-bloomgroup.com/uploads/1/3/0/7/130776684/rowogujosori.pdf
    • http://nataliemooremakeupartist.com/uploads/1/3/0/2/130270946/81df5a58804.pdf
    • http://nationwidehealthuniversity.org/uploads/1/3/0/4/130483986/9113407.pdf
    • http://structureinsurancegroup.com/uploads/1/3/0/2/130288455/3721915.pdf
    • http://dptrackandfield.weebly.com/uploads/1/3/0/2/130272524/b71708fdcf.pdf
    • http://travelrtw.com/uploads/1/3/0/2/130289732/vagoxati.pdf
    • http://nowallsministry.net/uploads/1/3/0/2/130289662/7155382.pdf
    • http://pameladirnberger.com/uploads/1/3/0/3/130323465/130323465.html#typhoid+test+cost+in+patna

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001341.bin
c7e7dc7bd45397eadaf3f3c551146d25e0c8d93065f17ac15ea5ce02352948ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1341 8488 bytes

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