Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf1e8014c424242…

MALICIOUS

PDF

31.9 KB Authoring application: Poppler-utils
MD5: 1c04edfc4f4f5e75b4c40a9c34b5c7b0 SHA-1: a0d5da6c9c76fc663305833e3f50a970edb0bcc2 SHA-256: 9bf1e8014c4242421a8fdca9828dc095ad7a26af0800f1a7a2a1890c1379bc0b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. This suggests a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious intent. The document body, though partially corrupted, contains text related to 'Listening exercises esl' and includes several of the identified URLs, indicating a lure to external 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 http://mywiguide.com/uploads/1/3/0/2/130288642/domexe-naxap-sefugubigipa-dozexusaduzono.pdf
    • http://wamits.com/uploads/1/3/0/5/130544009/gugajot_dujaxanigopa_kotukovide_guziwikeni.pdf
    • http://carlamaebailey.com/uploads/1/3/0/5/130546290/f0d2d0777733e5.pdf
    • http://charlesheinerfiction.com/uploads/1/3/0/6/130604467/f67a7b0cd7b1.pdf
    • http://brainstemtumorlady.com/uploads/1/3/0/7/130775145/vafakavup.pdf
    • http://crossfitswage.com/uploads/1/3/0/6/130621243/4815f9f67.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/6/130621511/130621511.html#listening+exercises+esl

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010fd.bin
5a52d8a72b7bb62462ee77fd453558f097eb5dd47c3edc7f10f792df5ca41979		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD 7732 bytes

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