Malicious PDF — malware analysis report

Static analysis result for SHA-256 2012e0f057bd7e5b…

MALICIOUS

PDF

46.4 KB Authoring application: GIMP
MD5: adf2b676359c75edd434c7f3cd055d8a SHA-1: 9148c0f30b045e263fc9c78d46c2097dd07ba8ae SHA-256: 2012e0f057bd7e5b9dcb5d003608da58731bd8d7b7ca7992a3fd105985c8b7e0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded links to other PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this file as malicious, specifically as a phishing or traffic-generating PDF. The document body, though obfuscated, contains references to a "webquest worksheet answers" which may serve as a lure. The primary function appears to be directing users to external malicious content.

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://biztriage.com/uploads/1/3/0/2/130288427/4613729.pdf
    • http://mollyjoseph2.com/uploads/1/3/0/6/130639951/salusezulor-lisuwegofiduta-pomiwave.pdf
    • http://mxjoinus.net/uploads/1/3/0/6/130622103/4824575ffec1bf.pdf
    • http://nanny101.net/uploads/1/3/0/3/130379398/1d6315a62b9b4b.pdf
    • http://godlikemedia.com/uploads/1/3/0/2/130291779/jodoba.pdf
    • http://charlieleegeorge.com/uploads/1/3/0/6/130639980/ab871421d4bbcd.pdf
    • http://hotty-toddy.net/uploads/1/3/0/4/130477083/dowasofij.pdf
    • http://localchelmsfordbuilders.com/uploads/1/3/0/3/130324203/8067887.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/5/130550681/130550681.html#weathering+erosion+and+deposition+webquest+worksheet+answers

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001216.bin
5ea1fcad608486e3ed595adc6adb570ef05ed21a9727724879871bfd90c7c891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1216 8836 bytes
font_01_sfnt_off00006e95.bin
cb0762f239aa40851d0545c083e78939829df52122df933e3268df9e51882fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E95 16260 bytes

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