Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd1efb59e6aae5c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 13:24:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dd1a4baa856fe81acb0e4c4c1995a69f SHA-1: 452ca3daf4ce1f4d4b531517d1b24f3b160a20da SHA-256: 9dd1efb59e6aae5c2d7840731be5b1b0c75486a3b3355efa205104c712b34bb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to a URL that is also flagged as a malicious redirector. The document body explicitly contains the malicious URL and text related to free Robux generators, indicating a phishing or scam attempt. While no scripts were extracted, the embedded URL is the primary indicator of compromise and suggests a redirection to a site designed to trick users.

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.tw/app/431946152/free-robux-websites-no-human-verification-game-hack In PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/musical-chairs-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/hacks-para-robux-gratis_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/op-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/get-free-robux-on-roblox-using-no-downloads_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-20210-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/hackear-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_off00002e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E11 21720 bytes
SHA-256: 5ef3ab6d799031096ba60b6bde929e1fb1cf64c780746b30c6e38823d2c29dde
font_01_sfnt_off00005de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE8 19532 bytes
SHA-256: e3099c9d0ccbc2ba8291647bb1da8d0e7f9f445102052ab388bc51958bf10930

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