Malicious PDF — malware analysis report

Static analysis result for SHA-256 91311b672ae0e53d…

MALICIOUS

PDF

43.2 KB Created: 2021-06-04 00:32:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1ce4c25294e44bc6194a9c0df5c8226d SHA-1: 1af7b770cea05fe768b5f2fe3fd43d0ea655c31a SHA-256: 91311b672ae0e53d14c881bb429d580cf13d6f401ffc9d4b4dc03f6615080a10
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/835599320/get-tiktok-followers-free-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-a-cape-in-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004df8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF8 24976 bytes
SHA-256: 02afedf9d965c7609bb80a16a0cbd0fe5c820555d85744011e0dc7b8479a3cfd
font_01_sfnt_off0000880b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880B 17692 bytes
SHA-256: 8cacd57cbae25f5163b35c5b464cf1f4e6be88960ce09657a88da3590579257c

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