Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c904cecab69311d…

MALICIOUS

PDF

45.4 KB Created: 2021-06-09 11:55:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 04cf3ebf2bc52662b9a1740b565a227a SHA-1: ada3a7d8424a5147a3e5f4d3841eb3fc0593c293 SHA-256: 9c904cecab69311d65c0885a9c4f27deb3af6cb3ecc72d1825f9fd9983358e15
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free item generators. The primary malicious URL identified is https://netcdn.tw/app/431946152/roblox-adopt-me-hack-script-pastebin-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely using embedded JavaScript to facilitate the redirection. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-adopt-me-hack-script-pastebin-2021-game-hack In PDF document text
    • http://halitbayramoglu.com.tr/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-weird_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-free-pokemon-go-accounts_GM1094591345.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-can-we-earn-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-skins-boy-free_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_off000052cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CF 24584 bytes
SHA-256: a88dc8ddb0f17208b6ae1862cc99f585cb586a931c377c9a42d0185e8edd12c6
font_01_sfnt_off00008b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 19508 bytes
SHA-256: 681e8521321f88d46face97d23e383c7aa17fffa79745fb8155c170d810522a8

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