Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d37799eed79032…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 10:21:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 06fe7becade22dfb6d326355b64ef600 SHA-1: d1473978d4c265ed34a3fc3663e993b1e487a12a SHA-256: c7d37799eed79032b0db6deef0633831235c988572b4efb5c5fe64ad93fdb118
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-gift-card-game-hack, which is likely used to deliver a secondary payload or redirect to a phishing site. The document body and embedded URLs reinforce this lure-based social engineering tactic.

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/free-robux-gift-card-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5D 24972 bytes
SHA-256: 8f111a600fc1cd5e6461552e5291a9cd3d8901c44f118a4f7f70ba65de9f1c4e
font_01_sfnt_off000088ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88ED 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9595 18640 bytes
SHA-256: 59f1432744b9d8cf879cb7c8a299bbbbba85d5427cd565107f85277265ec050e

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