Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d268dfc836263cd…

MALICIOUS

PDF

36.6 KB Authoring application: PDFBox
MD5: 1e4ce9870e6b0faf77df5863a3872de2 SHA-1: ad24211608eb709ee5c06ec0a2129cbdae738a39 SHA-256: 4d268dfc836263cde2120e956ecff244a14ad8f08707eb53a86af8d3be08a922
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO poisoning or to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially corrupted, contains references to medical terms and the embedded URLs, suggesting a lure to external, potentially malicious, PDF documents.

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://karinjohansson.net/uploads/1/3/0/3/130324451/perovi.pdf
    • http://wolfgangbaur.com/uploads/1/3/0/4/130476502/681bca4bcb23.pdf
    • http://tightrope.studio/uploads/1/3/0/6/130639642/rudeduvazoba.pdf
    • http://rachelnamba.com/uploads/1/3/0/4/130489350/dusodo-rirozaxen-lijanusutezedim.pdf
    • http://dillyspianolessons.co.uk/uploads/1/3/0/7/130739143/e0ee89.pdf
    • http://naveedsonikamembers.com/uploads/1/3/0/7/130739015/bc012378.pdf
    • http://nuezdejabon.site/uploads/1/3/0/5/130551023/5688431.pdf
    • http://autodiscover.foxchapeldistrictforum.com/uploads/1/3/0/8/130813730/235c42be7d19.pdf
    • http://med-impulse.ru/uploads/1/3/0/5/130551214/53b7b1679.pdf
    • http://middevonbatrescue.com/uploads/1/3/0/8/130814066/kexil.pdf
    • http://easttampa2461.com/uploads/1/3/0/6/130639061/morolev_luraruludexu_ditizufesa.pdf
    • http://eastside-fwb.org/uploads/1/3/0/6/130639438/jozomig_vovoxenemewope_zaguzi_pefevene.pdf
    • http://difficultrunponyclub.org/uploads/1/3/0/6/130621700/pumajuzazop.pdf
    • http://msschatz4thgrade.com/uploads/1/3/0/7/130740607/lasagoxemijix.pdf
    • http://www.pawsitivelycountry.org/uploads/1/3/0/8/130814861/nopoga.pdf
    • http://thehavens.club/uploads/1/3/0/6/130604872/37484a3f51f82a.pdf
    • http://stewies.store/uploads/1/3/0/5/130589072/3768c8dc25.pdf
    • http://lockedsecurestorage.com/uploads/1/3/0/5/130589114/fosoveg.pdf
    • http://74-123-78-145.mgwnet.com/uploads/1/3/0/7/130739635/130739635.html#cholecystitis+radiology+sign

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000317a.bin
6500e2fd818be7ac9b849b3f9dbd39e6856e1df8a3f1b9afb2813e39339238b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x317A 7976 bytes

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