Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c393dd11ffc5d8…

MALICIOUS

PDF

45.4 KB Created: 2021-05-16 17:34:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c8acc2670b8cf9dba5227219e07300e3 SHA-1: 0d100f929d0f38c6ee70e4ad9bd6ef142347abbe SHA-256: 37c393dd11ffc5d811e4c173f68a5e21fb0b2a37c47536898f8bf736ff186ec9
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 0.9507

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-spins-for-today-game-hack PDF link annotation
    • https://ethraa-sys.com/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/roblox-girl_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/huskybuckscom-free-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_off00004b4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4B 25616 bytes
SHA-256: b88463edfb6f6786c02ccaf9002fe0ee04c3930ed032fe167e1e18d9ec02e408
font_01_sfnt_off0000843d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843D 18240 bytes
SHA-256: a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20
font_02_sfnt_off0000a632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA632 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

Open this report in the interactive analyzer, or submit your own file for analysis.