Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85bbe288ff2a9be…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 00:04:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0ea69aab1b95ad6877024d39c9385c5b SHA-1: 409ed502eb559986125e746a99554d9d87fecf53 SHA-256: a85bbe288ff2a9be9ed95adc1576fb34c10887e813eac18cc2875c074b8e55dc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure for a "game hack" which redirects to the malicious URL https://netcdn.xyz/app/431946152/roblox-hack-game-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading or visiting a malicious resource. The presence of multiple similar URLs further supports a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/roblox-hack-game-game-hack PDF link annotation
    • http://www.notaioricci.it/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-coins-free_GM406889139.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_003_off00004604.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4604 26424 bytes
SHA-256: f5cd3079def9d58de930668d9be08d7585c1d48bfd8a4168149698f25c666aa1
font_01_sfnt_off0000844f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844F 18440 bytes
SHA-256: ebafd2a9612b8145e5e0fd0fae0a522d36691e15007df27d7d415ea6fce26a90

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