Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fea5565faf89f7b…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 17:24:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9fff9e2d9a6453d43bee8ef4e3f23e30 SHA-1: 8c7c31ebffe43e6487673921c7151ff50d73b1f0 SHA-256: 3fea5565faf89f7bcf8d93ce1f4e44cb6b2915ad863f2ff92d4af9838081cdf9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'hacked Roblox game' and directs users to a URL that likely hosts a malicious payload or phishing page. The ML classifier strongly indicated maliciousness, and the embedded URLs are consistent with a social engineering attack aimed at tricking users into downloading or visiting a compromised site. No scripts were extracted, but the PDF structure and embedded URIs are sufficient to infer a malicious intent.

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/431946152/hacked-roblox-game-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/roblox-clothes-maker-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/instalar-roblox-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/gimme-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-hack-servers-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-songs-mp3_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/wurst_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-with-a-fake-card_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/comment-creer-un-hack-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-fashion-frenzy-free-games_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-pizza-place-money-cheat_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_off00002fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB2 22580 bytes
SHA-256: c0dc9a943af90e4227eecf7e41f6ba5c22ea9fcd7af53fd05b6c3cf6d8197a78
font_01_sfnt_off0000621a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 19092 bytes
SHA-256: e06e2496ecc1c3d364978b7a8e0823831cb090cb55aacb01fa8d052e2f05e4c6

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