Malicious PDF — malware analysis report

Static analysis result for SHA-256 1319d5c97bc3a643…

MALICIOUS

PDF

60.1 KB Authoring application: LibreOffice
MD5: eb665fdc04aaeb37527a45c121cea3ae SHA-1: e8751bc8ea9ef74aa2e7cefa708859b4acabcf62 SHA-256: 1319d5c97bc3a643385f2b88195a5aa388004495e498c2d857556a392a5dc0fe
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including a critical finding for a large number of external PDF links, indicating a link farm. The ML classifier and ClamAV also identified it as malicious. The embedded URLs suggest a phishing or traffic-driving campaign, likely using the PDF as an attachment in a spearphishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://techarcana.us/uploads/1/3/0/2/130272485/12eed1d.pdf
    • http://jimability.net/uploads/1/3/0/6/130604414/juxofuzelagiv.pdf
    • http://mgpl-maa.com/uploads/1/3/0/2/130270812/2870516.pdf
    • http://soloptometry.com/uploads/1/3/0/5/130551247/f777de9181.pdf
    • http://eastgateinstitute.com/uploads/1/3/0/6/130620482/gireduronivif-bafowujebunevol.pdf
    • http://varshiniarza.com/uploads/1/3/0/6/130639448/5524191.pdf
    • http://michaelshusko.com/uploads/1/3/0/2/130272880/130272880.html#inci+s%C3%B6zl%C3%BCk+hikayeleri
    • http://linux.thai.net/projects/fonts-tlwg
    • http://www.thaitux.info
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e6.bin
08334feee8e619747f43d01e703823b79ba05f057b0f4d9ddd91d195a73c07f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6 8224 bytes
font_01_sfnt_off00008eda.bin
8964bc744959d16abf5bc8258ddc7eb57e85c5cff9058b798da886a8f296074d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDA 13580 bytes
font_02_sfnt_off0000ad37.bin
7a14fd8999ccc3534cf6073bb129b927586fc7e654267bf84196305b483839df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD37 4232 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.