Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1361d313173143…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 09:44:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 44aac6866f7a0d2b61d0021e538da7a9 SHA-1: 56329c1f66fdec2591213549374730417010bbcc SHA-256: df1361d313173143df785306a722437d59e8ffd5829fb3c3b436c5f4343f5189
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 0.9864

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.online/app/431946152/what-are-points-for-in-roblox-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/pubg-uc-rate-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-apocalypse-rising-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/updated-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-linux-free_GM479516143.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
stream_004_off0000513e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x513E 26572 bytes
SHA-256: c333ae417c9849f7376eae41c46c93017ada7e14aeb6810ec4514ec7070bb2f5
font_01_sfnt_off00008e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1D 18916 bytes
SHA-256: 206cb619b231d756b6c1a7d20fb1c5b26e436c335fc4475252eb18f08bbae5e5

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