Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34837b468bb92b8…

MALICIOUS

PDF

43.7 KB Authoring application: PDFBox
MD5: 2abac558908ea3024b0586a2be23e004 SHA-1: 854d6668e3e2573daca29ceec35c30c76d61e60b SHA-256: a34837b468bb92b8e48d71938b054614c472f992d37af4c4b199c6d048c5c057
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a phishing lure designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly support the malicious nature of this file.

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://richmondmonuments.com/uploads/1/3/0/2/130272290/muwobonuzeg-zadujaxa-bovefegazojamil.pdf
    • http://eriesistibleclowns.com/uploads/1/3/0/6/130620441/fadifejonawik_badoberubimepin_zefumawekigirud_misixixe.pdf
    • http://retrayno.com/uploads/1/3/0/6/130621000/nediz.pdf
    • http://livingthegoodlimelife.com/uploads/1/3/0/4/130488940/gafajozux-fozilalaruva-xotilurol.pdf
    • http://cookiesandfailure.com/uploads/1/3/0/4/130436207/zupilejebege.pdf
    • http://gloriaandfrederik.com/uploads/1/3/0/5/130590436/6182335.pdf
    • http://brandexa.net/uploads/1/3/0/4/130435732/sudasumuleliliseko.pdf
    • http://lasliben.store/uploads/1/3/0/8/130813797/2015985.pdf
    • http://mvstuff.com/uploads/1/3/0/7/130740224/8958428.pdf
    • http://newperspectivemedical.com/uploads/1/3/0/7/130740538/130740538.html#cm+14.+1+gapps

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001480.bin
5a0599fd36ccb9cbe68ac978c5cb17db7f1666c177b697c20f1acb4873e71585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1480 10000 bytes

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