Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d45ddc73a3b4bc…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 10:18:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0ace96b35408d8a789e0ce2ecf09f7b9 SHA-1: 132eb1f8529255d8a5e8607d6c666d9e46b76be8 SHA-256: c8d45ddc73a3b4bc27c189ed7d3ebc969683d86c55886811cd56daa87afff85d
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary link leads to a site offering 'free roblox game robux game hack'. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector chain designed to deliver a payload, likely exploiting a client execution vulnerability. The document body itself contains obfuscated text and URLs, reinforcing the malicious intent.

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/free-roblox-game-robux-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/gun-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-item-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-i-got-a-gross-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-level-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-free-nuevo-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-you-actually-get-free-robux_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_off00004f33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F33 26404 bytes
SHA-256: 9189289ae3cd59060c1c94bd14c78de0efd3c84191888ee7551a3838db92cd2e
font_01_sfnt_off00008c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C50 18576 bytes
SHA-256: 0d06e9bd517e1b98d178ce263f3d032eed24b39eeb2a279ea740e318572b409d

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