Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10980c54ae9211b…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 16:14:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 24c957baf4cd567a51b9dcd0172be84b SHA-1: 3dad6548f63d283c4b08a1daff65ebee96800e19 SHA-256: b10980c54ae9211be2a94b21a2529cd93f68fcf8400075ec501bb66648c00597
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to redirector infrastructure, specifically advertising free game generators and hacks. The heuristic firings confirm these links point to known malicious redirectors and lure users with game-related scams. While no scripts were directly extracted, the nature of the lures suggests a potential for JavaScript execution or further payload delivery via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-coin-master-cards-link-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/yummers-free-robux-obby_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-games-for-free-online-no-download-no-account_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/giving-people-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-cheating-tool_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/bad-business-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacks-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-booga-booga-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/dodgeball-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/los-hacker-de-roblox-mas-peligrosos_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-verification-or-download_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-have-free-animation-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/descargar-hack-en-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
stream_002_off000035c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C8 22852 bytes
SHA-256: 2b6fadfd41fe57b0c1e37958cfb8ece74c7861fb5d440dd4775854df62925c49
font_01_sfnt_off0000690e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690E 18340 bytes
SHA-256: b2017717319ed1cc4a90f63cde4a7ca53e868056cc2e1441a2f5bc7eaddf4cbd

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