Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde636d4e1976d38…

MALICIOUS

PDF

42.6 KB Authoring application: LibreOffice Draw
MD5: a23886430907cee89c9c0e16e8642b60 SHA-1: b9c25cb0574b1c128745138e1269363d42f227c3 SHA-256: fde636d4e1976d3807f73ee21f1f4581354646b19296385a7aee83674891f8a9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This is a common technique for distributing phishing content or redirecting users to malicious sites. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. No scripts were extracted from this sample.

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://depthstiny.com/uploads/1/3/0/6/130639812/tamonuzani.pdf
    • http://hostmaster.gastrokidzz.ch/uploads/1/3/0/6/130604162/daluwasamijefol.pdf
    • http://iamaugie.com/uploads/1/3/0/2/130289776/gafidotolewepididumo.pdf
    • http://vassautos.com/uploads/1/3/0/6/130621038/2420687.pdf
    • http://vapeeco.com/uploads/1/3/0/4/130476514/3712087.pdf
    • http://pharmawhitepaperlibrary.com/uploads/1/3/0/6/130605240/92d73b.pdf
    • http://taiguantravel.com/uploads/1/3/0/6/130604950/8816201.pdf
    • http://cbi-international.com/uploads/1/3/0/7/130776478/bukaseloxikufod_mutirebav.pdf
    • http://northshoreengineeringny.com/uploads/1/3/0/2/130289457/siwuj-vuzefuvepeje-botelizupola.pdf
    • http://duoclinica.com/uploads/1/3/0/6/130604283/5521093.pdf
    • http://ww.thenextevent.nl/uploads/1/3/0/2/130289482/raxanefibe_xigukapasekobi_mebukexopo.pdf
    • http://bhpaschoolinspain.com/uploads/1/3/0/7/130775493/3971247.pdf
    • http://konidarisart.com/uploads/1/3/0/4/130488506/8092154.pdf
    • http://newbraunfelsmasonry.com/uploads/1/3/0/3/130313741/lokuduzibudot-bitisowadu-jizisigenuz.pdf
    • http://sean--bre.rominastiebenphotography.com/uploads/1/3/0/6/130620607/130620607.html#pressure+points+in+hand+to+relieve+neck+pain

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035a3.bin
fb31025025499a0fb01c3c1bd89e32baf051e66ef536a35089523545b6160756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35A3 16248 bytes
font_01_sfnt_off00004d90.bin
e7c140f366a2d5ddcd4e24a08c1d7b2336b7bced0e760ef9bac8d5bc098771a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D90 7540 bytes

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