Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e3c21be17d0ba0…

MALICIOUS

PDF

35.7 KB Created: 2021-06-28 17:11:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 63f44fb1c20d2aa61d13b328f6f8917f SHA-1: 52c1ef355c994a46aaf358ae0093b9a358b2cf7c SHA-256: 85e3c21be17d0ba0b5cc611288f67fa0160a6dcbff7b155a7b34574f9e67855e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game currency and hacks, directing users to a known malicious redirector. The embedded URL `http://netcdn.co/app/431946152/how-to-get-free-robux-on-roblox-mobile-2021-game-hack` is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to deliver a secondary payload or phish for credentials.

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-on-roblox-mobile-2021-game-hack In PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/rewardrobux-com_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/why-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/hack-to-get-free-spins-on-coin-master_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_off00003268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3268 22456 bytes
SHA-256: f75bb9a251e4f271902dcc8f0e0850a330ed7d5e10f18496e4a25675af1a697f
font_01_sfnt_off00006483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 19776 bytes
SHA-256: bdb8310c3979cd5f90995398721c0c8121cce78c48aef75d25eb72a8377de3a2