Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad39345f9d2eba0c…

MALICIOUS

PDF

44.5 KB Created: 2021-05-19 23:08:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3004594b67ea3c39032f9271310528b0 SHA-1: e01a9b4cbda41b7e1bebb4a322cf7bbed5b3f030 SHA-256: ad39345f9d2eba0c05bcb6b17cb45b8dd4cccdc2d3e780d315ed78f66367d703
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/coin-master-free-gold-cards-game-hack PDF link annotation
    • http://lib.mbp.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.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_003_off0000495f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495F 24768 bytes
SHA-256: df1b14abbd28a1d26687242c1756ae90b279a5ea976b1732266c794b196f036a
font_01_sfnt_off0000816a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816A 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6D 17960 bytes
SHA-256: aba9a61c61b61fea048b73d77d5e297f3d5a3a83c57e433c8854d820da1f91b9

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