Malicious PDF — malware analysis report

Static analysis result for SHA-256 405138fc5620f0ba…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 20:43:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f0ccdbef8ea38b2f2c225d933f7532e1 SHA-1: 808278389e8c56f2277d4ac89c4f972e62ea4e49 SHA-256: 405138fc5620f0bafc8a3e76fd3a2db21ebd9cc5abc85d7d9069d671d6008165
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The ML classifier also flagged the PDF as malicious with high confidence. The embedded URL and document body text reinforce the lure of obtaining game-related cheats or generators, which is a common social engineering tactic to drive users to malicious sites.

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.co/app/431946152/free-form-jazz-roblox-game-hack PDF link annotation
    • https://dr-willmer.de/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/can-you-hack-roblox-with-lucky-patcher_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-roblox-gift-codes-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-free-robux-in-roblox-no-hacks-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-catalog-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/hack-para-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-music-gui-hack_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-item-catalog-roblox_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
font_00_sfnt_off00002fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEA 21952 bytes
SHA-256: db6bd2af9fc00f69e19a7378e920be89a88271832e1c8086d33f4820cf233d5a
font_01_sfnt_off00006036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6036 19156 bytes
SHA-256: 8766f37571c6004c9002ec4b1bd0b8c2e4dacd274b8f706e3aa0242c1e9e044f

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