Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cec877286307cb…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 06:56:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fd85d5185bb433dbb7f8fd75fd18a3b3 SHA-1: 78d00a8f49105c8f51120fa4625568faf41c192a SHA-256: 44cec877286307cb7de257ff40226b8ce8d83ea69ae1f217395f48a1cb4badb2
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 0.9865

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/free-robux-giveaway-game-hack PDF link annotation
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-mod-menu-apk_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_off0000526e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526E 25288 bytes
SHA-256: 10a0d5cf1387b9d0d86d0e17b27289e13b94d9d40003c38638c81933f4cd5532
font_01_sfnt_off00008b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6C 18820 bytes
SHA-256: a907981f6338d23acda294c558170907db38f399f16fdb2ca0bc536a0b707f6d

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