Malicious PDF — malware analysis report

Static analysis result for SHA-256 cced88116da99269…

MALICIOUS

PDF

46.8 KB Authoring application: Serif PagePlus
MD5: 9afba8e116bf53b43cf84bb42b7ea8eb SHA-1: cd8edf531f52c589bb10b46c91b1d574124c9d96 SHA-256: cced88116da99269d44ffad648c9e8226433ac39fa73c5a853834e5222ae4c8f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ndhaquascapes.com/uploads/1/3/0/6/130620222/wujovogux-maritaj.pdf
    • http://imaginaryfriendskc.com/uploads/1/3/0/5/130544072/zurizul_xiwisa.pdf
    • http://actingcoachlasvegas.com/uploads/1/3/0/6/130621846/1723926.pdf
    • http://djsacademy.com/uploads/1/3/0/5/130538986/130538986.html#right+triangle+trigonometry+finding+sides+and+angles

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011d6.bin
f08da579a0785693798a086e6401c1102cc48ab8ff3013b2751540d307a6148d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6 8264 bytes
font_01_sfnt_off000065d5.bin
179165c0eca37d96f3fc6bcb9c9f72a9a8227ad579c429c2458af057bd24c99b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 3360 bytes
font_02_sfnt_off000070e7.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E7 16036 bytes

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