Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecaacd837faa6f83…

MALICIOUS

PDF

46.3 KB Created: 2021-06-07 10:18:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d710f46deec526ca0e8624651b273b0e SHA-1: ac878d50a2e562e12d2f47ec9019df0524aab1a3 SHA-256: ecaacd837faa6f83728799d8e97a13773871c12a23586d37c259e93909aee5bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically targeting users interested in game hacks and free passes. The document body, though partially corrupted, contains references to these lures and embedded URLs. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/roblox-vehicle-simulator-free-gamepass-game-hack In PDF document text
    • http://mycookingpot.com/images/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/mobihack-net-roblox-hack_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_004_off000050d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D5 27104 bytes
SHA-256: c99b318f1ba32edbc9b8c5acdbb2b922041b461d1cedc8e0ec9e841e643ff1ac
font_01_sfnt_off00008fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAD 19276 bytes
SHA-256: 8683f39caf379811c50b585db5b57af1e729fac3d97263a553e8c51e2132c3a5

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