Malicious PDF — malware analysis report

Static analysis result for SHA-256 d693ae846f79b9af…

MALICIOUS

PDF

45.2 KB Created: 2021-05-12 04:57:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91a18938802cdc295fa06b5c71e3b9d8 SHA-1: 6d859e01203536007f180dc4e09d0de11a926bea SHA-256: d693ae846f79b9af77a3c8113f4e6e0158f8b5a54da26173e4b0388368def95c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a visual download button lure, suggesting an attempt to redirect the user to download malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the overall structure indicate a likely attempt to deliver a second-stage payload, possibly via a downloader disguised as a game-related offer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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 https://netcdn.xyz/app/479516143/free-op-minecraft-servers-game-hack In PDF document text
    • http://www.sfakia-online.com/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c9f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C9F 25136 bytes
SHA-256: ef92f1dfe0caf2f7515daa120c3a360dc6afd3b2e57fe816e2538b370b53cea6
font_01_sfnt_off000085d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off00008fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAD 17856 bytes
SHA-256: a77b7ff2a68dfc8683e01ffa7febdd478081a7961822aa2eebc6e1611696765c

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