Malicious PDF — malware analysis report

Static analysis result for SHA-256 72641a8858bef813…

MALICIOUS

PDF

48.4 KB Created: 2021-06-07 18:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eab362ac7524334654f4f74712d24458 SHA-1: 2c846665ee22868f514deb4022394b1b8f6d2afd SHA-256: 72641a8858bef813332a4e1c7155b47d27ba0b4e81efa447aa9efcfc10498bd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, disguised as lures for game hacks and free generators. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the nature of the lures strongly suggest the document's purpose is to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/high-school-musical-breaking-free-roblox-id-game-hack In PDF document text
    • http://prazdnik-kzn.ru/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/tiktok-free-80_GM835599320.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/roblox-free-hats-2021_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-more-followers-on-tiktok-free_GM835599320.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-latest-version-hack_GM406889139.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_004_off0000500b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500B 26444 bytes
SHA-256: 5186cde6df293c75fcdb6fc55b3f53e2bfde0e894841a7877fad14959906af70
font_01_sfnt_off00008a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A96 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000973e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973E 19428 bytes
SHA-256: 3ce8b6ef5efe2dea87a25bd21df60efff918f6fa0ccf17aaea4b63b3edc4d9be

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