Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb16ce27de4c2d7…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 05:25:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6e211b5364fb65eeb6ef6270da1d3dbd SHA-1: a872a91aacbcc1a146723a2fd45db00920b25685 SHA-256: adb16ce27de4c2d73a127343e23be0663ce2f6efd6d2d08c575d80d558a17100
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering 'free generators' or 'hacks' for popular games, indicating a lure-based attack. The heuristic firings confirm the use of malicious redirectors and a common lure pattern for social engineering. Although no scripts were explicitly extracted, the nature of the links suggests the PDF is designed to lead the user to a site that may host further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/835599320/tiktok-free-like-bot-game-hack In PDF document text
    • http://librarysenior.com/repository/how-to-get-a-free-pokemon-go-account_GM1094591345.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-hack-money-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-spins-apk-download_GM406889139.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_off0000510c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510C 28640 bytes
SHA-256: 04b4db845b75772d087a176b57b1aa86e8065c3263de14f8d946d637060d89cb
font_01_sfnt_off000090ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90EF 2896 bytes
SHA-256: 98478e2fbfabd582329b6206c0d46f67523cf5e299cb16118f1065b4dd5ec6a6
font_02_sfnt_off00009ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD6 17672 bytes
SHA-256: 620b0c726c44b0ba0e513f262f245126f9bfbffd99da9b3c78ced389d462e5b5

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