Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca57170f65de1ac…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 12:06:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 482a48d8c9fb82725433f0d869321fd8 SHA-1: 56f00a4988a3f698ff4cb88746a0465ae4279ef7 SHA-256: 8ca57170f65de1ac8b57871f1c57122f22ed359274ce273132c9a553a4b25648
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a malicious redirector, disguised as generators or hacks for popular games. The ML classifier also flagged this PDF as malicious. The embedded URLs and the document's content strongly suggest a phishing or scam attempt to lure users to 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.co/app/431946152/free-gift-card-roblox-generator-game-hack In PDF document text
    • https://art-concept.gr/images/roblox-cheat-money-android_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-t-shirt-free-adidas_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-jailbreak-hack-redboy_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/free-robux-generator-roblox-game_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/free-t-shirt-roblox-2021_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/how-to-get-free-robux-hack-on-phone_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/how-can-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.art-concept.gr/images/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://www.art-concept.gr/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • https://art-concept.gr/images/free-roblox-combat-scripts-for-studio_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/free-wings-roblox-2021_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/best-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-cheat-codes-for-money-xbox-one_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.art-concept.gr/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://art-concept.gr/images/best-star-wars-maps-free-modeled-roblox_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-cheats-to-get-free-builders-club_GM431946152.pdfIn PDF document text
    • http://www.art-concept.gr/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.art-concept.gr/images/archery-master-3d-coins-hack_GM406889139.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_off00003101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3101 21788 bytes
SHA-256: 6d27b70c20209ba477b8123c5a7a815b94b1e41d79a7566ea7c00b44cf60c8ab
font_01_sfnt_off000060b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 18864 bytes
SHA-256: b4af34dea4cd09566085214a288aef62038d258e5cc61f9368b1a36f45855a03