Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b635b85b62acd71…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 05:50:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 81167485f0743e7f931689c663c0c363 SHA-1: 192e6f30d751b2aadd5dff4d9b9c6b6fbc4a7dd4 SHA-256: 4b635b85b62acd71bd7bb62ce40e58b86c83122653b6981188f43efae2fdae75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded URLs and text that lure users with promises of free in-game currency and items for popular games. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spin-and-coin-links-game-hack, suggests a scam or a download site. The ML classifier also strongly indicated maliciousness, supporting the assessment of a phishing or scam attempt.

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-spin-and-coin-links-game-hack In PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-robux-games-that-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/roblox-how-to-have-free-obc_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-password_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-does-people-uses-hacks-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/roblox-free-without-sign-in-also-free-robux-no-downloading_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/boku-no-roblox-remastered-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_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
font_00_sfnt_off000034d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D8 22780 bytes
SHA-256: 09c91557178945b3fb0b5665b85cca53a44cdc2a1eeabf8a49be1f000b867f14
font_01_sfnt_off000067d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D9 18520 bytes
SHA-256: d69a0a2edd95f9e38b96bcbf992a69ddda142703a71f9cfee81eaec1a075863f

Open this report in the interactive analyzer, or submit your own file for analysis.