Malicious PDF — malware analysis report

Static analysis result for SHA-256 786ff7a54d474ea9…

MALICIOUS

PDF

47.3 KB Created: 2021-06-04 03:29:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ac42592e064cb11b8ed9dc6b68a255bd SHA-1: c10807f98a3d053aaa0231d74d11a4e0de8cc9b9 SHA-256: 786ff7a54d474ea9635190322388adefeed80ffc4739501a6b93814ea82f6e37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, aiming to trick users into visiting potentially harmful websites. The document body, though partially corrupted, includes a URL that aligns with the heuristic findings of a game hack lure. No scripts were extracted, but the presence of malicious links strongly indicates a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.online/app/431946152/how-to-hack-people-in-roblox-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5198 24880 bytes
SHA-256: a01f3759be61d0454ae8ddb9d3c4adaa2b2e234352f7540384311c6c0b7ba1b6
font_01_sfnt_off00008ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC2 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off000094d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D0 18676 bytes
SHA-256: 10ff19610ec10ba06ce370fdc76468137d93ed174f58c2f80433e0d310d8c060

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