Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabb331588d85907…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 18:11:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9da83a87ed9e62a891ebc1ecddedf40d SHA-1: bf593fbfbfcd8ecd0cf4bee31846e0f813697be4 SHA-256: dabb331588d85907eb7b286bb8c8a28653a99ea2f584156ddd57e489453eeb2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users to click on links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document body contains obfuscated text and multiple URLs, reinforcing the phishing and redirection attempt.

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/link-for-free-coins-in-coin-master-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/obby-gives-you-free-robux-no-password-required-2021-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-cheat-source-leaked_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-jailbreak-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/obby-games-on-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/ud-how-to-change-carr-colur-free-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/como-descargar-hack-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-generator-without-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/funny-hack-scripts-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-1x1x1x1-hack-crazy_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_off00003452.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3452 23568 bytes
SHA-256: 71298109ad8d7c938ff58fb56128934ac98e331737d5a91fc1e3b928919b5923
font_01_sfnt_off000069f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F3 18168 bytes
SHA-256: a48da4cfe55a624bb9e3a1d72da27453416af78d7800a5ce358445dfb8f01111

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