Malicious PDF — malware analysis report

Static analysis result for SHA-256 379bf89cc6e00edc…

MALICIOUS

PDF

45.0 KB Created: 2021-05-17 08:38:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7132badaf151ec47516665fd4bab46b7 SHA-1: 059a776e1dcdabdfb13939e375d9fcf7e7025af2 SHA-256: 379bf89cc6e00edca17c404b37e638ad5618c540a3dde9b51647c53d4b4666b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator' or 'game hack' lures for popular games. The primary link, https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-hack-game-hack, is flagged as a malicious redirector. The document body and embedded links suggest a phishing or scam attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/coin-master-free-spins-and-coins-hack-game-hack In PDF document text
    • http://acktivities.com/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004757.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4757 26428 bytes
SHA-256: bf860af7f44099db34df1d48c8fc55494311172c6109f154a7bddc745bcb30fd
font_01_sfnt_off00008386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8386 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00008db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB0 18228 bytes
SHA-256: 968d77e43c6b0b1c299d9da4b9fdaa5840c103d7fe58a67c77b67690964fdfdc

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