Malicious PDF — malware analysis report

Static analysis result for SHA-256 454a0ec2bc4a39b9…

MALICIOUS

PDF

45.0 KB Created: 2021-06-09 03:49:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 234d894d89e4a12dc32ff6615dc97ad2 SHA-1: 9c8b59b10c3b3c2e5138d1db2f497f19cedc4aba SHA-256: 454a0ec2bc4a39b9de0622f8065c191095272f73f992570cb4784b782b7e25a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings indicate that the PDF links to known malicious redirectors and uses a lure for game cheats. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or scam attempt designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/cheat-commands-in-giant-simulator-roblox-game-hack In PDF document text
    • http://foo.com.tw/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/earn-rbx_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-and-tix-tricks-amp_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/pokemon-go-free-coins-hack_GM1094591345.pdfIn PDF document text
    • http://foo.com.tw/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/hacks-fpr-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-shoulder-pets-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-pocket-edition-free-download_GM479516143.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_off000050a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A5 25964 bytes
SHA-256: f1c706b5e0a60cb5e6a297a5054c924f9bbbab117f24b9b8b387d50588baa0db
font_01_sfnt_off00008b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B50 18976 bytes
SHA-256: 682c7dc079f62b4f81cb0e00e24e45cc9d7de41c6089a19e081d412013e44b50

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