Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc891551bbc5cb38…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 11:28:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5d1a385f77f78a870a6de0dfa1654786 SHA-1: 052274a9349ca458695aa04c7ef07eaa32153be4 SHA-256: bc891551bbc5cb38de8a2456a5b6958cf0eb920982ef72b5fb79ecdbd90ad27c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, promising free Robux and game hacks. The document body and heuristics indicate a lure for users interested in game exploits, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of malicious links suggests the intent is to redirect users to a site that may host further malicious content or attempt social engineering.

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.co/app/431946152/roblox-hack-robux-without-human-verification-game-hack In PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/how-to-make-a-roblox-hacking-program_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/free-robux-and-builders-club-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/free-robux-no-verificationor-offer_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/mobile-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/nasl-roblox-a-cheat-engine-dan-hile-yapilir_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/how-to-get-free-clothes-on-roblox-on-your-phone_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/hack-roblox-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/roblox-hack-club_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/bugmenot-roblox-2021-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/cheat-robux-roblox-2021-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn8sleman.sch.id/__statics/gudangsoal/files/roblox-hack-client-2021_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_off000031e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E3 22132 bytes
SHA-256: 6381a8b3efacc515fad13d0f6bc191d325c065ead8435ce1e66276b7cf47a1d2
font_01_sfnt_off000062f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F4 19776 bytes
SHA-256: c3a90d276ec5e2d7a2a08ccfd92e7ed07db1db2b0fabb5291765989ef1c1cfc5

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