Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa54778870daa25e…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 04:33:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 43c9eb32cebaeab741dec87e7247d4e0 SHA-1: ef7d367c98d977433e188b167270eb13d3eafdcb SHA-256: aa54778870daa25e7d1e1158b90ce7e5366fbc9fd3078658995f6f6d6c638c8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The document body and embedded URLs strongly suggest a phishing lure designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate redirects or exploit vulnerabilities.

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/free-robux-hack-no-download-2021-game-hack In PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-2021-robux-for-free-no-hacks_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-robux-no-downloading-games_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/only-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spin-and-coin_GM406889139.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_off00002fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCA 22476 bytes
SHA-256: ecb7319c764c7b5b3b43ba7cda0338c89acb7e53a71cf95bec8025264c09f11c
font_01_sfnt_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 19868 bytes
SHA-256: 1cbf47ccd71c659d26e73d95e5b94a4c736b516be5803b94d097de4ec0ec2a76

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