Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fbbddd45cb9f25…

MALICIOUS

PDF

58.4 KB Authoring application: PDF Studio
MD5: a22fe6f29ce1525d91b13f43b06f2e16 SHA-1: 40558e4e4c482faafe7e0106497db5d460bd7ac8 SHA-256: 82fbbddd45cb9f2588fece34f48191506f3164a1c18d353339316e722681ce0f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO link farming or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the embedded URLs suggest a phishing or content distribution attack.

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://sta-66-99-58-212.ladse.org/uploads/1/3/0/2/130270955/kikozazibezoz.pdf
    • http://factscore.com/uploads/1/3/0/3/130379266/7182212.pdf
    • http://dantothofficial.com/uploads/1/3/0/7/130775103/wokasuzuxaberef.pdf
    • http://schurgerhealtheng.com/uploads/1/3/0/6/130621351/lugafidokos_sevuzarobevudos_xolixejigeda_gaxidenero.pdf
    • http://msjacksonsclass.com/uploads/1/3/0/4/130476483/kiradikusalifukowuge.pdf
    • http://mtbsiteservicesbusiness.com/uploads/1/3/0/7/130775584/9c1784e.pdf
    • http://www.defendyoursmile.com/uploads/1/3/0/7/130775772/a3d78a754696ff.pdf
    • http://kristenleestylist.com/uploads/1/3/0/8/130874514/tojinizoraxa_zefajudopize_roziborapo_vokowukegeleziw.pdf
    • http://mrboldt.com/uploads/1/3/0/7/130776374/6514bf6e.pdf
    • http://efwpartners.com/uploads/1/3/0/7/130738641/c1953f93385.pdf
    • http://residencebaiaverde.com/uploads/1/3/0/7/130775712/mudigetomukoze.pdf
    • http://www.outofmywritemind.net/uploads/1/3/0/6/130621757/bivezuxufile.pdf
    • http://hazmatpackingandsupplies.com/uploads/1/3/0/6/130603721/130603721.html#small+2+storey+house+design+philippines

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001272.bin
1c567593301cb44851be9ededa423bb5ef90e479401b28e5b5e768eadc5cd6b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1272 7852 bytes

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