Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d5c168c1bf6cd8…

MALICIOUS

PDF

33.0 KB Authoring application: Poppler-utils
MD5: f22ac70844052bed74336dfe5d78cc9a SHA-1: 2e6dc06b29f609ea80d7a13fecf5664eebbfc410 SHA-256: d9d5c168c1bf6cd8433c8d04c1a2a5aa7a2d992e047bd389fde674df0e5fbf72
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique commonly used for SEO-based phishing or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary IOCs, suggesting a link farm designed to redirect users to 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://post.directory/uploads/1/3/0/7/130740323/8fc39df02d17432.pdf
    • http://www.carrielcopeland.com/uploads/1/3/0/6/130639440/zalar.pdf
    • http://jfjaney.biz/uploads/1/3/0/3/130323555/4640797.pdf
    • http://mta-sts.mail.goldhabits.net/uploads/1/3/0/4/130476185/4074518.pdf
    • http://huangjiapoyal1688wangshangyule.br3h.com/uploads/1/3/0/8/130874564/zevoxu_miduk_xodowasewitu_sididak.pdf
    • http://www.a-backoffice.com/uploads/1/3/0/6/130620384/felegekib_zotodejolopuv_zijuwuxax.pdf
    • http://sageguidance.com/uploads/1/3/0/6/130639511/8911118.pdf
    • http://katocpta.net/uploads/1/3/0/7/130776295/puwojilapet.pdf
    • http://inspiring-choices.com.au/uploads/1/3/0/2/130289638/biwon.pdf
    • http://mymoneycoach.co.uk/uploads/1/3/0/3/130313170/5675183.pdf
    • http://galenetics.com/uploads/1/3/0/2/130287542/gexuvexemavo.pdf
    • http://mystaybuddy.com/uploads/1/3/0/8/130873955/zagadoraja-lemezun-xisepa-beradulov.pdf
    • http://equinoxtalks.com/uploads/1/3/0/7/130776451/3340013.pdf
    • http://allancapital.ca/uploads/1/3/0/5/130588799/ec439a724330413.pdf
    • http://night-at-the-museum-rotary.org/uploads/1/3/0/6/130620503/fexinibiw_lolamuwiwexuzig_nodokobu_zugotokapike.pdf
    • http://www.cofchrist.host/uploads/1/3/0/5/130588586/f67517df65f8.pdf
    • http://precisionaqua.com/uploads/1/3/0/5/130588195/672dfc53.pdf
    • http://vintagewoodworkingtools.net/uploads/1/3/0/6/130621458/8346646.pdf
    • http://northshoreresidentialma.com/uploads/1/3/0/8/130874115/napudikaf.pdf
    • http://nexuspos.net/uploads/1/3/0/3/130379409/dd1d38d05.pdf
    • http://unique-security-solutions.com/uploads/1/3/0/6/130621730/130621730.html#oceanocomaphy+an+invitation+to+marine+science+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000223c.bin
9cd76d3fe95244588e63c8f45d39cf5d3e991d65845cd860ca3458ac35b4d50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x223C 7372 bytes

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