Malicious PDF — malware analysis report

Static analysis result for SHA-256 717558bb2321fbab…

MALICIOUS

PDF

36.1 KB Created: 2021-06-26 04:33:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d3acbf381d34dc780b3e169575cf9c89 SHA-1: ac367c6704c17bef202f6b122cab6d67a38fc2ed SHA-256: 717558bb2321fbabbf2236a589fc8d5b25c8c0512118000af3c1b95ce783db70
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a redirector hosted at http://netcdn.co, which is associated with game hack lures and brand impersonation (DHL). The document body and embedded URLs suggest a lure for free Robux or game hacks, likely leading to credential harvesting or a secondary payload. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/free-sky-slayer-for-roblox-game-hack.
  • 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-sky-slayer-for-roblox-game-hack In PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/google-for-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-to-hack-roblox-games-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/roblox-money-cheat-codes_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/obby-games-on-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/robux-hack-ios-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/zyrus-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-robux-no-verify-needed_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/see-all-players-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/can-you-hack-peoples-roblox-credit_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/cheat-engine-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/robux-hacks-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-robux-cards-2021-codes_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
stream_002_off00003529.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3529 23080 bytes
SHA-256: c734e03c209837dec0b7bb209d82cb2d639bd73380a98f3f5fc322954fb49016
font_01_sfnt_off0000681d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 19000 bytes
SHA-256: b695d78a7ac6171d3eb4359be07f38dd1d9fbd9c54ad490f50451b3f2471ffda