Malicious PDF — malware analysis report

Static analysis result for SHA-256 424ab6c71d1ae2d2…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 06:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: beaede923860b9721d47a54dcde7e2aa SHA-1: 966b20d87e55ce1093f73d60e33692878131180e SHA-256: 424ab6c71d1ae2d2fee2ed98e53a4055db6ddbe6ca26cd4b05d862f7f814f341
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for external URIs, indicating a lure to download content. The document body, though partially corrupted, suggests a theme of free game-related items, consistent with phishing or scam attempts. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.online/app/479516143/free-minecraft-maps-game-hack PDF link annotation
    • http://www.digilib.uim.ac.id/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005298.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5298 24812 bytes
SHA-256: 9a91ede520fa005d6461e9061756cc3eed1d2571268935b0bff7baf6e4dc4561
font_01_sfnt_off00008ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD7 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000094c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C2 17744 bytes
SHA-256: 642e76b92f67015eb87e7bb2f8978493590a3d76ebc6958dd5b149369a6bd5f2

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