Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55737ab35375861…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 15:16:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d8b3083ebaaf13f9319687d2ebba6870 SHA-1: aa0e9138521b18b958874de0d44b9ddd900586c3 SHA-256: b55737ab3537586150fce8bc8939e372dab72ec0e31987612f54493eb6d4d1f8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. This lure is designed to trick users into visiting potentially harmful websites. The presence of multiple related URLs and the ML classifier's high confidence score support this assessment.

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/hacking-incident-roblox-game-hack In PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-robux-hourly-giveaway_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/is-friending-a-roblox-hacker-bad_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-do-u-hack-accounts-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/ultimate-hack-for-roblox-unpatchable-level-7_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/1b-free-robux-from-game_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/roblox-jailbreak-hack-exploit-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-to-make-a-roblox-skid-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/robux-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/arcane-legacy-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-robux-admin-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-to-get-free-cash-in-roblox-jailbreak_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_off000032b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B5 22044 bytes
SHA-256: c7e4f64d51a3142e78354b0eee9cc4b30a8a53e56a5cb7520b2f345871103bc8
font_01_sfnt_off00006356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 19052 bytes
SHA-256: 06a0782303d9a61e191bd8322db08d289d5e9539484cef181606520480bfc335