Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f9066b8bfb64cc…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 18:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 85a99ac3be186644a5feca4d87fe7230 SHA-1: 0a7e82878f6dffc73b815249805b275a5cafc72f SHA-256: f0f9066b8bfb64cc0a115484ecf4cbf05947d8273cbd96a14c06e05875428d44
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this, indicating a phishing attempt to trick users into visiting a site that likely hosts further malicious content or exploits. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/479516143/can-you-get-minecraft-for-free-on-pc-game-hack In PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/real-roblox_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/pubg-uc-redeem-code-2021_GM1330123889.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-hack-roblox-games_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_004_off00005293.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5293 26004 bytes
SHA-256: d655a44b7a5631abe51033992debbee476dc71059032e7810b72506cf506e395
font_01_sfnt_off00008d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9700 18164 bytes
SHA-256: 8ea32a8e02995d89b02eafa4dcf94783bb214565530167096c35ff51f311a6e6

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