Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc07029784f877a…

MALICIOUS

PDF

40.0 KB Authoring application: pdf-parser
MD5: 6d460c27507d69a01a37206bd33e1d29 SHA-1: 3c8817d51e68e6dd985ddbe76673457daa7d8745 SHA-256: 1fc07029784f877a79068306b12b7dedc903c1b2ef94857ad81d8f80b9fd3958
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a technique commonly used in SEO poisoning and phishing campaigns to direct users to malicious content. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall' further supports a phishing classification. The document body, though heavily obfuscated, contains text related to 'Grade 3 reading comprehension worksheets', suggesting a lure to disguise the malicious intent of redirecting users to a network of external PDF files.

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://caagroupllc.net/uploads/1/3/0/5/130541765/subomilikewubagana.pdf
    • http://93778645.nhd.weebly.com/uploads/1/3/0/2/130287945/mitixikoxafalabowumo.pdf
    • http://annannadesign.com/uploads/1/3/0/6/130604601/gafivi.pdf
    • http://runninghorses.org/uploads/1/3/0/6/130604231/8245486.pdf
    • http://littlebigroompost.com/uploads/1/3/0/6/130604493/720b38b.pdf
    • http://anatomyfinalproject.com/uploads/1/3/0/7/130776272/gegozuzoz.pdf
    • http://northwestuu.com/uploads/1/3/0/8/130814960/130814960.html#grade+3+reading+comprehension+worksheets

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001096.bin
fac8469ea4202b04d18a33e01d888d1ab5cb0f6dd3cf744fb5e1793e0f577695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096 8552 bytes

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