Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbdac2804e8db75…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 06:20:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7ba66cd1762eb47b69e394ec5d6a0e4b SHA-1: 1cdfc7f61ebe837ed116d879f3bada771763df73 SHA-256: ddbdac2804e8db755cc9d2950f96bbf2cda8cd3394d64d82312f37f9a8587fdf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly flagged this PDF as malicious. The document body and extracted URLs indicate a phishing attempt disguised as a game hack or currency generator, likely intended to lead users to a compromised site or download further malware.

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/how-to-get-free-robux-fast-and-easy-2-game-hack In PDF document text
    • https://www.tena-g.hr/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/keyword-free-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/earn-robux-today_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_off00003016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3016 23260 bytes
SHA-256: 79c69f78adca560cf4fb4195dcb7d0582ff2165c2e189a8091a7061360fcf4e8
font_01_sfnt_off00006444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 19460 bytes
SHA-256: 9b50cb1b5688327a18f8b36085d8a46976f4e2d14556af51219db3fdbcdb7262

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