Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e39b722179dde8…

MALICIOUS

PDF

52.6 KB Authoring application: Smallpdf Desktop
MD5: e16216f75b8e76086292f75665b98eb1 SHA-1: 2d5cfff893a5637c290e738abf56d60e7a17fed1 SHA-256: d4e39b722179dde85873d38a2e7974b67668ee1d0ddf0bfc9106b1d45f14d9a9
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The document body, though heavily obfuscated, contains references to URLs that are also present in the link farm, suggesting a coordinated effort to redirect users. The primary attack pattern appears to be a link farm designed to distribute malicious content or engage in SEO-based phishing.

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://netoaterro.com/uploads/1/3/0/6/130603779/talonamaril.pdf
    • http://www.ayemade.com/uploads/1/3/0/5/130539370/miziwojozezire_sonijusizutozu.pdf
    • http://ronawatts.com/uploads/1/3/0/5/130542982/042ad.pdf
    • http://leagueofwickedstepmothers.com/uploads/1/3/0/5/130589389/diloguki-zororajalupe-ruwama-rufudukadafegi.pdf
    • http://whiterockbrewing.ca/uploads/1/3/0/2/130274316/426734e4dfb.pdf
    • http://akashachamberlain.com/uploads/1/3/0/6/130639036/fumitezovone.pdf
    • http://millie4good.org/uploads/1/3/0/5/130540366/mubekuwe_kuzujofuxenarum_timimunol.pdf
    • http://mx.mishablaise.com/uploads/1/3/0/9/130970003/kunofutesafadibab.pdf
    • http://preview.aleutmgt.com/uploads/1/3/0/8/130815228/bivowajoxufe.pdf
    • http://ratix.net/uploads/1/3/0/6/130604369/9749562.pdf
    • http://timromney.com/uploads/1/3/0/4/130490151/f187be07.pdf
    • http://naplespropertygals.com/uploads/1/3/0/9/130969896/5129400.pdf
    • http://mjeportfolios.com/uploads/1/3/0/8/130874385/34ca710f5b34.pdf
    • http://rezourceguy.com/uploads/1/3/0/6/130639417/6586971.pdf
    • http://neilsalem.com/uploads/1/3/0/6/130605292/54872e23e7.pdf
    • http://remarkables.club/uploads/1/3/0/6/130622110/nijeravuz.pdf
    • http://ccharveyministries.org/uploads/1/3/0/7/130774990/ziwoxamitejuxe-rubererumes-dudinavuti-magitoxi.pdf
    • http://all-things-wedding.com/uploads/1/3/0/4/130435514/a1e8b3baa33e7ab.pdf
    • http://taylor--kathryn.rominastiebenphotography.com/uploads/1/3/0/9/130968917/130968917.html#difference+between+agilent+7890a+and+7890b

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001097.bin
16b7144c47158df72bdcaa763769baabd076544bab8665a0c91f8303a571416d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1097 8596 bytes

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