Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0178e706892c82…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 10:05:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 28183178bba1e9d7f5c4383ce56747a9 SHA-1: d7389e15eb531a11bf6ff39e18ab94edd1789c02 SHA-256: cc0178e706892c82abc127e2d4323ce635dd178b9a88a4f50993fdce1849edf5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as a game hack or generator. The document body explicitly mentions 'how to get cloths for free on Roblox' and includes the malicious URL, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier strongly suggest malicious intent.

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-cloths-for-free-on-roblox-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-download-free-windows_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/chostaty-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/5-hacker-fampsos-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hacks-para-roblox-jailbreak-dinero_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/como-tener-dinero-infinito-en-meepcity-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-avatars-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-makes-robux-items-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-health-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/gamecheat-us-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/best-free-roblox-games_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
font_00_sfnt_off0000324d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324D 22560 bytes
SHA-256: 53bc14c9a07e4422b7e97ac1c349ebf994e8e67ac65b0fcb89d875efe654b1fd
font_01_sfnt_off0000649e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649E 19084 bytes
SHA-256: 4b08d686b347fff29c3850d668b5533bbbf093c4bb071386cceb6b92ca92d0bc

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