Malicious PDF — malware analysis report

Static analysis result for SHA-256 a092b01211b3ca3f…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 01:28:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 91008951bff6165381388822a2ec7f4e SHA-1: 0c3bbc4f1180276c7f6acb277493405f82e927a9 SHA-256: a092b01211b3ca3fac2448c7841fe7d2f621cc04ef61de606dd44fba560ad239
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, specifically advertising 'free generator / game hack' lures. The document body and embedded URLs reinforce this theme, aiming to trick users into clicking through to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a common pattern of using social engineering to drive traffic to malware or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/40-free-spins-coin-master-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-oof-sound-free-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/youtube-jailbreak-robux-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-life-ii-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/prison-life-script-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-2021-19-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/redeem-your-free-robux-at-http-get-robux-eu5-net_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-simulator-free-model_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/admin-hack-roblox-kazok_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002d33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D33 22280 bytes
SHA-256: 5f17c818327d5303e92c1efe1df6acb20a46fa4c770ed6068736c8c288c67063
font_01_sfnt_off00005ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBF 18408 bytes
SHA-256: ce82454962f5f3d8f32b8d714c7dfb82c9591ccd0919bf0a26c63f76146bf830

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