Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d452b82586e5ea1…

MALICIOUS

PDF

33.8 KB Created: 2021-06-29 05:37:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 79ae87191c02b7f637432f8728afb660 SHA-1: 639a9441433748a7554b2b3ff74e38d1b8da1b9a SHA-256: 7d452b82586e5ea10e34de55604836384cffa5f2c0142cdb093ea4e035b44428
160 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promises free game items and hacks, suggesting a lure for users to click on malicious links. The ML classifier also flagged this PDF as malicious. The primary URL identified is http://netcdn.co/app/431946152/how-to-make-a-shirt-on-roblox-2021-free-game-hack, which likely leads to a malicious download or phishing page.

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/how-to-make-a-shirt-on-roblox-2021-free-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-pokemon-givers-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/huong-dan-tai-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-greenwood-town-how-to-get-free-deathbringer_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-accounts-without-pin_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-account-for-roblox-infinite-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-pants-for-free-on-roblox-without-bc_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/stinkywinkys-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/wwwrobloxcom-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-check-it-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-groups-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
stream_001_off00002af4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AF4 22368 bytes
SHA-256: 3321ba1d865f0cba7903c2706f2b4ec5ea247288fc6b95ff859948d7542d2173
font_01_sfnt_off00005ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA4 19972 bytes
SHA-256: 504694d1e658e83da8ee1d4d0ddb7107b56cf4a49e56a680cd7b4aa63e73bccc

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