Malicious PDF — malware analysis report

Static analysis result for SHA-256 749f8b74c8b70284…

MALICIOUS

PDF

40.5 KB Authoring application: PDFedit
MD5: 0772d6179db9bc0ed7e4e99afdf2cce8 SHA-1: b5d58971f656b1b9bf0ef2fd17bb0a595cbcfcc2 SHA-256: 749f8b74c8b7028489bb69f8e10de7f5825d732bf0c91d11c6cc53e5745071e2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, a technique commonly used for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is indicative of a link farm attack.

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://daytonavenueorchard.com/uploads/1/3/0/7/130740590/862ffdf766.pdf
    • http://hostmaster.torridonlive.com/uploads/1/3/0/5/130543840/tuleja.pdf
    • http://crewsmerz.com/uploads/1/3/0/3/130313434/49807.pdf
    • http://lipsupportstrategy.org.uk/uploads/1/3/0/6/130621109/fc86e8f4f07b9.pdf
    • http://traffic-graphics.com/uploads/1/3/0/4/130489350/wanewidijuxozeba.pdf
    • http://digitizedandorganized.com/uploads/1/3/0/8/130874612/e77b1c61a.pdf
    • http://mrbugfix.com/uploads/1/3/0/4/130483050/0fbc40913d142.pdf
    • http://tellmesomethinggood.net/uploads/1/3/0/6/130639205/senalarofamop.pdf
    • http://morrisoncentre.com/uploads/1/3/0/2/130288301/busafunutisafuzova.pdf
    • http://staceylytle.com/uploads/1/3/0/9/130969439/wizozabotanub_sonipijivijul_nenofigeza_wopuwira.pdf
    • http://passyunksquare.net/uploads/1/3/0/7/130738707/577022.pdf
    • http://boxedwine.com/uploads/1/3/0/7/130738569/dc4fcd6a96d14ce.pdf
    • http://besmokefree.co.nz/uploads/1/3/0/4/130489097/bawib-lekuwuzubel-pavixejaluxefol-fatubikaxo.pdf
    • http://743.bpmtc.com/uploads/1/3/0/5/130589420/wufamarusubebe.pdf
    • http://hostmaster.mudlark.co.uk/uploads/1/3/0/2/130272406/c18c04aff6320.pdf
    • http://host197.carmichaelnl.com/uploads/1/3/0/5/130588482/130588482.html#solving+matrices+row+echelon+form

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041e9.bin
62cfaaa8629e0da715b3d389c3eff18a29536439c5a1b1f779f9d4b32280d48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41E9 8500 bytes

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