Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bf65a1dd684489…

MALICIOUS

PDF

36.0 KB Created: 2021-05-24 19:03:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f57ef7a0f435701d7e12a5956af815b0 SHA-1: bc8f5b78517f952db643edf00dae722f8dcf1b60 SHA-256: 83bf65a1dd68448929ff3897f477c14458e29edc00712f7e42ddae663a069187
102 Risk Score

Malware Insights

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

The PDF contains embedded links and a heuristic firing for a 'Secret Recovery Lure', indicating it's designed to trick users into revealing sensitive information like private keys or backup codes. The document body and extracted URLs suggest a lure related to game cheats or generators, likely leading to a malicious download or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.xyz/app/406889139/master-coin-free-spin-game-hack PDF link annotation
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003254.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3254 25884 bytes
SHA-256: 96fe8f758b46fad522ebde7334f26c9059a7cddaab496435dfdb2cec49674509
font_01_sfnt_off00006c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 17884 bytes
SHA-256: 2eace5707960ab6674c345fc5925bb74d79b72c9d0e947ec779627780b9711cb

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