Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fed3a35b0f6cb5d…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 16:44:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64bfec116b688d7decfa52999e21239d SHA-1: 42d50fc89f4380ec85ee0afa8fea758b80b456d9 SHA-256: 6fed3a35b0f6cb5d84c6f7cb4aa6e29a1280ecf9f5900bcbe5e89efa31228957
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, that lure users to websites offering game hacks and free spins. The primary malicious link is http://netcdn.tw/app/406889139/coin-master-free-spins-link-download-apk-game-hack, which is likely intended to lead to further malicious content or downloads. The presence of numerous similar links suggests a broad phishing or scam campaign.

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/coin-master-free-spins-link-download-apk-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-blood-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-diamonds-in-roblox-royale-high_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/good-roblox-hacker-names_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cara-cheat-roblox-di-android_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-someone-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-teleport-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-codes-2021-july_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-2021-no-wait-time-not-fake-instant-febuary_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-roblox-admin-dl_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/lazyblox-com-free-robux-ad_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-fan-club-groups-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coins-for-coin-master_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_002_off0000350d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x350D 23004 bytes
SHA-256: 854f07c8343b5353baf54efe31e5657ee0e3a24a8c10e1cfdb0e77d61c827aa9
font_01_sfnt_off00006899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 18924 bytes
SHA-256: 2f668e7adfc4b4bc8cb44f1e65126816f5d1c84e1bbd9f90ce224b2ba7b88995

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