Malicious PDF — malware analysis report

Static analysis result for SHA-256 83268f6062582842…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 13:16:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b112eb1368cbc2964d52045e5a72a8e1 SHA-1: 093e4512c01ee5e394425bbba28a748025dcd99d SHA-256: 83268f606258284257f02ec19a3eedf38f5bf2b27200a140351c2c79929e5a1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted at http://netcdn.tw/app/406889139/fbchampion-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a lure for game hacks or cheats, indicating a phishing or scam attempt. No scripts were extracted, but the primary malicious activity is the redirection to known malicious infrastructure.

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/406889139/fbchampion-game-hack In PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-how-to-buy-stuff-for-free_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-much-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-hack-roblox-jailbreak-on-pc_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-lv6-free-trial_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-no-verification-easy_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-cheat-codes-mad-city_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-free-robux-by-playing-games_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_off00002ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF6 22388 bytes
SHA-256: ebc87e1c604c4aa0a4177b87897049cfd9e9b29632be3c3176527dbed483ff58
font_01_sfnt_off000060af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 18656 bytes
SHA-256: fb679c9250522cab0344be15c9898f12ed930a7de6dfe2591d59bad5f2ca43f7