Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5359655ed60212…

MALICIOUS

PDF

47.0 KB Created: 2021-06-13 16:19:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8b174ace55985dba1702d60d18ba4a2 SHA-1: 2faebc9edf8dcd4f73f237c51aaaf8864cfa7572 SHA-256: 6a5359655ed602120d42d60736cfc888a548d56169cfbcf78d8c78ac020071b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to game hacking, specifically for Roblox, and embeds a URL that is flagged as a malicious redirector. This URL, http://netcdn.co/app/431946152/how-to-hack-in-roblox-without-cheat-engine-game-hack, is the primary indicator of malicious intent. The document body and heuristics confirm the use of a deceptive theme to drive users to this malicious link, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-hack-in-roblox-without-cheat-engine-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-critical-strike-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-kart-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/account-stealing-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-do-you-get-robux-for-free-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/stella-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/inside-the-world-of-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-clothing-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-shirts-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-real-roblox-credit-card-numbers_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-do-you-hack-an-acounte-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-bc-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/survivor-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-codes-twitter_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-skin-packs_GM479516143.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_off000052db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52DB 28132 bytes
SHA-256: a704b3a9b244efc7e1d2b9d6e77295d6069b4949ccc6364df0e7954e166ce7dd
font_01_sfnt_off0000921a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x921A 19360 bytes
SHA-256: 48ae190ec93ae17b6f385607db26a7f394654589122d59c69c5d0c9709c97806