Malicious PDF — malware analysis report

Static analysis result for SHA-256 b970804d6e65b8ad…

MALICIOUS

PDF

48.6 KB Created: 2021-06-01 02:25:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b8b2d385e50b33405e5b6a0fce4920be SHA-1: 83f1c855b6ee294859ca999828c0b6757cc3e08b SHA-256: b970804d6e65b8adc45742c083113c40b049e6c9779fae479201867fe0a69042
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically pointing to a URL designed to lure users. The document body, though partially corrupted, contains the same URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the PDF structure and embedded URI strongly suggest it's designed to lead the user to a malicious site for potential exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/descargar-hack-para-roblox-game-hack PDF link annotation
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-roblox-sites_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/como-tener-robux-hack_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-colouring-pages-free_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-hack-survoivr-in-roblox-pc_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-hack-download-no-survey-no-password_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/prokjs-free-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-unused-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/minecraft-education-edition-free_GM479516143.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_off0000506d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506D 25796 bytes
SHA-256: 9f2a746700e24e0f18b510d1a434b7889ec490403011b715fac7b4e09e610555
font_01_sfnt_off00008c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C58 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000996a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996A 18792 bytes
SHA-256: 3ced8f86128f4343bf5c8c02f960a7298384d8d460cc8f8876349ffac134b37e

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