Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ce97017fc83f6c…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 09:39:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a4970637d8e446fc072c480ff71242c0 SHA-1: d64c1c7ba8b9ac21f523ea0d51d3181968231d22 SHA-256: a5ce97017fc83f6c6e61397d244ee8c7feeeb91f41b978561597c61f2096be8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/how-to-hack-roblox-lumber-tycoon-2-2021-game-hack. The document body and heuristics indicate a lure related to game hacking and free in-game currency, designed to entice users to click these links. The presence of embedded URLs and the malicious redirector strongly suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-roblox-lumber-tycoon-2-2021-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-promo-codes-october-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/is-roblox-free-on-the-computer_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hacking-roblox-by-hacking-roblox-by-zia-lets-play_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-make-shirts-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spins-for-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
stream_001_off00002b37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B37 22788 bytes
SHA-256: 5994d8f1d58c7e719d7115654d9d104b9b10e25178a38be12b0e7ed53a6ac392
font_01_sfnt_off00005e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8E 19800 bytes
SHA-256: 054c174c0bed41bcb427d051ffec9a6c63f19c5962c5c845d7317bc42299aa64

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