Malicious PDF — malware analysis report

Static analysis result for SHA-256 756a524fa2d8e706…

MALICIOUS

PDF

33.3 KB Created: 2021-06-30 03:34:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4bfd01755fbdaa4578eaa8eab3478101 SHA-1: 677dc7e28650e87e3a9bde32e5343a213edb88e7 SHA-256: 756a524fa2d8e706c9475d693b7f04758579ae4ba9f9b9fe0f1fbe1d579121ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to what appears to be a malicious redirector infrastructure, disguised as a 'Robux Hack Generator'. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure of free game hacks strongly suggest a phishing or scam attempt, likely leading to further malicious content or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-hack-generator-no-download-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/scpninetailedfox-mod-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/cool-hacker-names-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/can-u-get-hacked-buying-robux-on-your-debit-card_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-items-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-phantom-forces-anti-cheat_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/get-free-stuff-roblox-gear_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/infinity-gauntlet-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-hack-on-computer_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/me-hackearon-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-piano-sheets-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/gear-me-hack-roblox-november-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-codes-2021-online_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_off00002b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4F 22376 bytes
SHA-256: 4c3cd5c0176eaf292fbfe69f0fa12228b0649bee30ef4a64512c77fba7003e74
font_01_sfnt_off00005c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2F 19404 bytes
SHA-256: 33d03a822d49b6bc8934ab265cf33311976c0fc2857b32e26392bc8a465aef99

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