Malicious PDF — malware analysis report

Static analysis result for SHA-256 9579e9a5ec52022b…

MALICIOUS

PDF

46.0 KB Created: 2021-05-13 02:42:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: da1e6392367d700a89bb22c466c53611 SHA-1: 809d35ecbac5c96f8d2bdd84d52b5ec6bd752685 SHA-256: 9579e9a5ec52022b22015598d7267dd40233446ad9bad38b6cc81e49bec5b96e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA 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 0.9432

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-redeem-code-for-coin-master-game-hack PDF link annotation
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/robux-adder_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B01 28896 bytes
SHA-256: 0851e5981be585414549cb2066e311e82ea3fc594c75ed7f8079cdd62b3a0088
font_01_sfnt_off000087d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D9 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000091c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C3 18144 bytes
SHA-256: 8e08ca8cea331ef635d4f0d43e9b7f0e55ee5a5b0bb4b3b8f10d73ecaad2eef0

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