Malicious PDF — malware analysis report

Static analysis result for SHA-256 b208779dbcf91769…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 11:08:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d820f60b8fe7c3ad359b0aa8cd1da86 SHA-1: 43926f1e9a005dfde602791fd2abe929f7679750 SHA-256: b208779dbcf91769ba240fa5b1d2292c04b2ce8411cf3b366aaabe84a2dbd668
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 0.9832

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.online/app/479516143/how-to-get-minecraft-windows-10-for-free-with-java-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-ban_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/get-verified-tiktok-free_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-reward-links_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_off00005715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5715 25656 bytes
SHA-256: 14ecce03d4fd24372188a57dcfae29009d7c869a1a726f6e58e2f92ed22e0e4d
font_01_sfnt_off0000910b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910B 18972 bytes
SHA-256: 8e658ed9ffe7233ae998901bc6eec399b36e43f77efcaafe704fa409c54d4733

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