Malicious PDF — malware analysis report

Static analysis result for SHA-256 8330ce36a9c3f179…

MALICIOUS

PDF

125.0 KB Authoring application: Solid Converter PDF
MD5: f809a54ab4dc97f989b260855f442fdc SHA-1: 4b31ce9f2c8050d4d07d67a6de3916cec6db401b SHA-256: 8330ce36a9c3f179d6730585a19cbe88fc9d2de735a62fd31a434b7de0a91219
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with most URLs pointing to other PDF files. The document body mentions 'Android studio previous version' and instructs the user to uninstall software, suggesting a lure to trick users into downloading potentially malicious files. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports a phishing or malicious download campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://lapen.us/uploads/1/3/0/7/130738658/notoxi-fisekajama.pdf
    • http://sanblastoursislands.com/uploads/1/3/0/4/130488615/c8e94bfb5ee.pdf
    • http://mooreinnovation.org/uploads/1/3/0/3/130313316/nisimadakepewelez.pdf
    • http://cwcphysio.com/uploads/1/3/0/5/130550880/rusejurawem.pdf
    • http://simplifycoaching.com/uploads/1/3/0/6/130604470/dolosixudaluk_rodinaxuwe_xefisotakaj.pdf
    • http://mohamoudegal.com/uploads/1/3/0/5/130551599/ea966.pdf
    • http://myteslawraps.com/uploads/1/3/0/6/130620522/joriwogu_pidel_zilasomibif.pdf
    • http://bodyworkbybarb.com/uploads/1/3/0/5/130543148/130543148.html#android+studio++previous+version
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001354.bin
6257920c169b8f3624d2fe6156415ca48e6c8736ddb529b66512f1245512e5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1354 9828 bytes
font_01_sfnt_off000059fd.bin
63c3618f9a0da124b64097cd0247f2f60ad3370e6c76316b4c14b390b394f531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FD 20324 bytes

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