Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b7616b322e06fd…

MALICIOUS

PDF

41.2 KB Authoring application: Scribus
MD5: 0d1109e0288025c05df387a4ac3a004a SHA-1: 3177faa3425ee8a1a33894780f6f6096ebf41a34 SHA-256: a3b7616b322e06fd58bfb1bd8e46ea8bb29eb971a33c222d89c7d00ce7831e2f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also indicate maliciousness, specifically related to phishing and traffic redirection. The document body contains a mix of seemingly unrelated text and the URLs, suggesting a lure to disguise the malicious link farm. The primary attack pattern involves directing users to a network of potentially malicious PDF files hosted on various domains.

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://revivetheroxy.org/uploads/1/3/0/2/130270743/novupigav.pdf
    • http://shopconsidertheravens.com/uploads/1/3/0/2/130289235/nowimoz_fugiza_damolerek.pdf
    • http://thesupporthelp247.com/uploads/1/3/0/6/130640194/77487b.pdf
    • http://113366.co/uploads/1/3/0/4/130436224/7284290.pdf
    • http://ryanmecheski.com/uploads/1/3/0/6/130621610/6f24832.pdf
    • http://mobilewritersguild.weebly.com/uploads/1/3/0/5/130545001/puwinapesuwaxisozon.pdf
    • http://mgp-audio.weebly.com/uploads/1/3/0/2/130272086/vatosuvexuz_sajiborexa.pdf
    • http://the-city-exchange.com/uploads/1/3/0/5/130552106/2998259.pdf
    • http://frostsurveyors.com/uploads/1/3/0/6/130604667/lediluvuw.pdf
    • http://smartmoves.info/uploads/1/3/0/3/130324419/rokomigigofen_tadibebotup_xegutevazaxepa_zekituxaj.pdf
    • http://danceofthemagi.com/uploads/1/3/0/5/130588407/wananat-nisuje.pdf
    • http://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/6/130604240/130604240.html#new+balance+450+men%27s+running+shoes

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001328.bin
31b291d12c420c02257521df6d62957bb4f9fa4d04ef34514bd938c5d8e85098		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1328 8284 bytes
font_01_sfnt_off000059b7.bin
669a22844ddb84b64a1d93eb6147c2b8b7ca76f4316fe4be2bbf69c96252e72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B7 16180 bytes

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