Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6f5f515a6b9598…

MALICIOUS

PDF

33.3 KB Created: 2021-07-06 11:41:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 25b631ada44311a284cfd45ac58051f2 SHA-1: d3d4737bc20437a3b68478bc8c2a89c03aa5d143 SHA-256: dc6f5f515a6b959807f015082d4dc39e9ac36fb25ceef8a1f093a42d37620ad2
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/479516143/how-to-get-free-minecraft-skins-game-hack PDF link annotation
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/descargar-hack-de-roblox-deathrun_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/robux-hacker-com_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-a-hacked-account-back-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-how-to-cheat-in-currency-in-games-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/god-hack-on-roblox-with-check-cashed_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/wie-bekommt-man-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-good-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-rocitizens-how-to-get-a-free-house_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-create-a-shirt-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-insert-script-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-change-username-on-roblox-for-free_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_off00002f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4B 22008 bytes
SHA-256: 8c82ff00eaee6e7b21729de904c0459e5f53bd68fece199b1ed874034cb8fc69
font_01_sfnt_off00005f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 18332 bytes
SHA-256: e8acfcfa131f60f693473cca03f32eadd9acbcb1f7d85dff875cec79b037e2ac

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