Malicious PDF — malware analysis report

Static analysis result for SHA-256 cffecedd229e2875…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 02:47:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 63dce589bdfe17dc490a5ceddeb914e6 SHA-1: c2a647351ed03fe9ba8394aaadfc1e254b04cdaa SHA-256: cffecedd229e28759e4b0f0f6035442f277f97d9a129c84cdfc198bd944aefba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links, including a critical finding of a known malicious redirector at http://netcdn.tw/app/431946152/lazyblox-com-free-robux-game-hack. The document body and extracted URLs suggest a lure for free game currency (Robux, Coin Master spins) to trick users into visiting malicious sites. No scripts were extracted from this sample.

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.tw/app/431946152/lazyblox-com-free-robux-game-hack In PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/cube-eat-cube-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-free-robux-without-hacking-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-daily-rewards_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_off0000315c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315C 22248 bytes
SHA-256: d2c70a8cfd53160befad50e60332b10e24aa42094e26ddc386c70e544f905b5e
font_01_sfnt_off000062c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 19312 bytes
SHA-256: f9ede7273c4848aab069705d78d47b2d010167552475a4dce029ed291f713c56

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