Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3e9b0a3189e45c…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 20:54:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b2828a458b5dec0de427a423c7ba5e75 SHA-1: d0953338a4b34e2c149b3d1410665be26ccea099 SHA-256: 2c3e9b0a3189e45cd950d0dc1c78a4122bb3ed4747e7ff371ec09e41862e59d8
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-coins-and-spins-game-hack PDF link annotation
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-into-bloxgurg-for-free-with-no-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/can-you-hack-on-roblox-on-xbox-one_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/roblox-fantastic-frontier-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/if-everything-in-roblox-is-free_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/magitan-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/roblox-obby-free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-hacks-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/tiktok-free-usernames_GM835599320.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://elearning.man4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-working_GM431946152.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_002_off00003279.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3279 23360 bytes
SHA-256: 2289533bcd66bd3e74a05526001ae76e9e5ce440d7be09e9a2a3d8868c215570
font_01_sfnt_off00006742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 18348 bytes
SHA-256: 8f4e14d352258b2a04c4750a5c5e6ee18e44525ef82eed3820f54d352c64eef8

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