Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aca6465fcf8c575…

MALICIOUS

PDF

34.6 KB Authoring application: QPDF
MD5: b7597aab60a4fd7e5358b35c6dde0ab9 SHA-1: e9f0641a872d1836947d35d71fc096b357d111b8 SHA-256: 2aca6465fcf8c5759a58da502ddd122bb6468b3b57db20ba63436c0152654612
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 https://fagiluruves.weebly.com/uploads/1/3/0/5/130543279/a868f504.pdf
    • http://a.marisths.org/uploads/1/3/0/4/130436354/funovupipetodub.pdf
    • http://mentorconcrete.com/uploads/1/3/0/2/130273578/fawufetazefip.pdf
    • http://mikeisthekey.com/uploads/1/3/0/5/130588403/wifojowoguxo_dujaj_wixop.pdf
    • http://ruxizhang.com/uploads/1/3/0/6/130639787/21299.pdf
    • http://dlrapartments.com/uploads/1/3/0/5/130589433/5388270.pdf
    • http://aerialprotectivesolutions.com/uploads/1/3/0/2/130291699/8374972.pdf
    • http://tumoporu.thepeacerailway.org/uploads/2020/01/28/7f9171ecc5.pdf
    • http://mymissblue.com/uploads/1/3/0/6/130603948/130603948.html#1997+international+4700+wiring+diagr

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011b5.bin
3fb9c1fba937039ea8a9a769dbf713d20e49cd280a29361726e5e142d38ee045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5 8176 bytes

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