Malicious PDF — malware analysis report

Static analysis result for SHA-256 1decdbce699410e2…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 18:23:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9780e413ad20278675b09d68732a2b36 SHA-1: 5609e1616ebcd58ee50217265a13ce0aab0c8544 SHA-256: 1decdbce699410e283d89aed17b5010e7f8fe347c25f55837d1ce586d83082cc
200 Risk Score

Malware Insights

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

This PDF document employs a lure for game hacks and generators, impersonating 'Paypal' to trick users into clicking malicious links. The primary link, 'https://netcdn.xyz/app/431946152/roblox-account-taker-game-hack', is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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: https://netcdn.xyz/app/431946152/roblox-account-taker-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 https://netcdn.xyz/app/431946152/roblox-account-taker-game-hack In PDF document text
    • http://jointworkstudio.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://jointworkstudio.com/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/demon-roblox_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_003_off000047c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C1 25852 bytes
SHA-256: e54253f616d44d751049507a70cb4bd80789d54a3d936cf28a3bf9f26bd1bd47
font_01_sfnt_off000082e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E7 18428 bytes
SHA-256: a45c208a7567f3e6804dce25d11280ac896a92182563dc04cbc3a4f5e023aa05

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