Malicious PDF — malware analysis report

Static analysis result for SHA-256 676d2bb2ff845ba3…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 13:30:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db1b7c9642212bc24c3b2d3d5e73683e SHA-1: 76b81c648d4a73e4a8425710702bb0a3c2577824 SHA-256: 676d2bb2ff845ba3357e4f167049b72ffc78fb2e6110e2841bde2c096023d468
200 Risk Score

Malware Insights

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

This PDF document contains multiple links to redirector domains, masquerading as free game hacks or generators, which is a common lure for credential phishing. The document impersonates the Facebook brand, but the linked URL does not match the brand, indicating a phishing attempt. The primary malicious URL identified is http://netcdn.tw/app/479516143/minecraft-free-apk-java-edition-game-hack.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/479516143/minecraft-free-apk-java-edition-game-hack.
  • 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/479516143/minecraft-free-apk-java-edition-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/upgrade-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pokemon-ultra-brick-bronze-roblox-free-shiny-eevee_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/earn-free-robux-game_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-kidnap-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-games-that-actually-work-june-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robuxian-free-robux-hacks_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cheat-pour-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-for-mac-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-free-unblocked_GM479516143.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_off000031ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BA 22364 bytes
SHA-256: 62a50a9fab801b6d0a787cf8f766bdcd1feedbd68d5aad64bcde7838590edece
font_01_sfnt_off0000635b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635B 18800 bytes
SHA-256: 5ca11b21852c978a3589f2a1e3ae77149b05caabc0c186675280143f50ca4da0

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