Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3d599c398be1c6…

MALICIOUS

PDF

51.7 KB Created: 2021-05-16 20:49:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8db98bef3b5d6ca71c16fdea5a63f9b9 SHA-1: fde8f90c490698c783cfdcea430f71620d2582ed SHA-256: 3a3d599c398be1c6a0e19fc4559fb8f1d98013083a1cff32b0c1ff3e5b8b2fa9
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that point to known malicious redirector infrastructure, specifically advertising game-related hacks and free items. The ML classifier also flagged this PDF as malicious. The document body, though partially corrupted, contains similar lures and URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9246

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 https://netcdn.xyz/app/431946152/free-roblox-clothes-game-hack In PDF document text
    • http://mohacad.hu/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A87 36376 bytes
SHA-256: 069de0ccadc0315a9b5db4ae728761a67e003a96767e5bac3ea0548655682387
font_01_sfnt_off00009b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9F 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000a846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA846 18216 bytes
SHA-256: e50810547e3c30daf02b15d5ac458835679762fa1a68c20d7c153a389bd1cc19

Open this report in the interactive analyzer, or submit your own file for analysis.