Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbc6b6ffecea7c8…

MALICIOUS

PDF

46.5 KB Created: 2021-06-07 20:19:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f1470eac216e35bcc3207a618faf8166 SHA-1: 099b55003338dc45d162a79644d979e91287f40d SHA-256: adbc6b6ffecea7c82fb99e4a66e48258ac48d71cb9a8032777cd6e49a83d699b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating an attempt to lead the user to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'Nuevos Hacks De Roblox 2021 Benimo', reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/nuevos-hacks-de-roblox-2021-benimo-game-hack In PDF document text
    • https://amiranet.com.br/files/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/hack-client_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/what-tiktok-free-movies_GM835599320.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/hack-dusk-roblox_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/i-want-to-break-free-roblox-versin_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/roblox-free-colouring-pages_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BF 26600 bytes
SHA-256: 269df4aaac76d54af414b400ab0b012b6b9be6bae68673b9531dca991c02d803
font_01_sfnt_off00008ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 19388 bytes
SHA-256: b38509e3998d77d73de61d4bb2088bc2d267e8a435cdbcc1c17aceda276fc687

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