Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ec11b639b997ed…

MALICIOUS

PDF

50.6 KB Created: 2021-06-03 13:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1cdb0696d00c9f0be572024eb88758e1 SHA-1: 13fe46ff2cc715d940ddf618f43aaef38fcaa450 SHA-256: 67ec11b639b997ed984a188788f8621d5423ff2b524755c937d884d15ffc1472
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and a heuristic firing indicating it's a lure for game hacks and free currency. The primary malicious URL identified is 'https://netcdn.online/app/406889139/free-coins-and-spins-coin-master-2021-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a potentially malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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/406889139/free-coins-and-spins-coin-master-2021-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/is-tiktok-free-on-apple-store_GM835599320.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F6 26528 bytes
SHA-256: ad7fca512a895bbc454ee538414f4f855063bc31dc0cd60ce81a845c1d5afdbe
font_01_sfnt_off00008a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A84 4092 bytes
SHA-256: 1bf0354e0b27c5a21195a6580e8c4462d0029121cead22ac384e58d58906d139
font_02_sfnt_off0000985c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x985C 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA24B 18460 bytes
SHA-256: 871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a

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