Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccf5000e55c195c…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 13:45:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d1d08fa46e3918e01b6bae4d3ba421bf SHA-1: b36383ba90f93a04a9134d01a2a4b9664a3804de SHA-256: 2ccf5000e55c195c7cc85e8c25c2f0faf28859643c6ff687fc69b64562273129
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator' and 'game hack' lures. The ML classifier strongly flagged this PDF as malicious. The primary lure appears to be a scam related to in-game currency or cheats, designed to trick users into visiting the malicious URL.

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/431946152/free-robux-codes-generator-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hacks-for-roblox-deathrun_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-catalog-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/does-free-robux-work_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/can-roblox-accounts-be-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/cheat-roblox-jailbreak-tembus-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-ban-people-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/tlh-hack-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_off00002f2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F2E 22952 bytes
SHA-256: c6bc6bd806f1ff8321bff30e0fbffb7133543a0d497a71510813cd9cd56ee095
font_01_sfnt_off000062aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 18996 bytes
SHA-256: 5eb0e14e84a96ce31996bcd37de003c05f35194690cf7e19bda56cbb05988c9f

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