Malicious PDF — malware analysis report

Static analysis result for SHA-256 549a739cfbc172c8…

MALICIOUS

PDF

48.0 KB Created: 2021-05-31 03:02:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 41593b99b70c4f8631c85d2364af7903 SHA-1: adc8b23f6ea22952d48593c54c2fc438615f95ce SHA-256: 549a739cfbc172c81566c3c83d558ba248e037f5b9631cb8dd19ce07e0252fd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting free game hacks and generators. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware or phishing attempts. Although no scripts were explicitly extracted, the nature of PDF redirects often involves JavaScript to facilitate the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8017

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/minecraft-free-download-game-hack In PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://playhack.in/minecraftIn 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_off00005665.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5665 24844 bytes
SHA-256: 9bb963803c0a03217e1766ad6a283bdf1a2c6db6fd8764f2c49cb4eb9d259f87
font_01_sfnt_off00008f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F03 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off000098a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A4 18292 bytes
SHA-256: eff5919d985126b8591bb7cd3dea6a103dcf6f67049ada279646be2986fdbf31