Malicious PDF — malware analysis report

Static analysis result for SHA-256 39facf0fbb78df39…

MALICIOUS

PDF

41.5 KB Created: 2021-05-11 02:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4af12b2f8c408f2989d84a9d93aa8709 SHA-1: 77231b000c7778a64a48f4ccea28483915b4e056 SHA-256: 39facf0fbb78df39a847dfece52c7efdecec699dab662d180350ef4efaa9cc5a
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9971

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/how-to-use-redstone-game-hack PDF link annotation
    • http://repository.poliven.ac.id//repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-spins-for-coin-master-2021_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
font_00_sfnt_off0000492d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x492D 24632 bytes
SHA-256: f9d0440faa01d0e8c8a5c26850a46dcc385f8f878d0ff6a14c818faa3c4f0107
font_01_sfnt_off0000811c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811C 17884 bytes
SHA-256: 49225106bdef37dc12b43e070aa0b6f880d37999c864f067329419f213985cc4

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