Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd81246978ab890…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 09:17:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 976138e95711835e6fe63f590917f9c7 SHA-1: bae17dbe33e9b1818883480bfcc5a1939d9990af SHA-256: 2fd81246978ab89060f3b7f449c7a70123dcb5cfd44f48aac7bab54cd2f86c67
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary malicious link identified is http://netcdn.co/app/431946152/roblox-crashes-every-time-i-run-cheat-engine-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

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/roblox-crashes-every-time-i-run-cheat-engine-game-hack In PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/top-roblox-anti-cheats_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-robux-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/wizard-life-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-robux-quiz_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_off000031ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AC 22432 bytes
SHA-256: 56f4f1061b4adf72f2c958c76c10a8a84bc6a619f93bd4a528986b509545d0a8
font_01_sfnt_off00006385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6385 19384 bytes
SHA-256: 638a9ae9f35bcde31409c1bcbf174e0e95fed7cda1cb675a327c131d62d86d57

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