Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd1044ebcbd5679…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 02:51:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-26
MD5: e8e621931ca1248ba4c9abe61f8b5123 SHA-1: 338b70089bed2a91474dcfcce3483cbf33f62b29 SHA-256: 3dd1044ebcbd56795dd0d1a9f4c6c44a445ffdf136bcfd6ed020a748d84be98d
180 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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-roblox-accounts-with-robux-2021-game-hack In PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-tiktok-and-like_GM835599320.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/codes-for-skyscraper-tycoon-roblox-that-give-free-money_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-hack-roblox-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/fart-attack-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-javascript-pastebin_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-change-your-roblox-name-for-free-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-claim-spins_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
font_00_sfnt_off00002fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB7 21816 bytes
SHA-256: cde4e84fcd44bd7374c0492ced33b122b77cde05530c7783210aab193e143462
font_01_sfnt_off00005fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 19780 bytes
SHA-256: 25192f6a53e08aa9ffc26a88a4bc642b185baba041384cccd6a0910bb22c1d67

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