Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb08f105f9ea5b1…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 23:59:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ab230ae4ed3459bc0992a79eec07b08e SHA-1: 1a57258ee76fc9b85677516e67561cc2028b9c58 SHA-256: deb08f105f9ea5b13c0e27b6da38237f6dd47a69daa8b01d8f6de0a9f3b0f783
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically promoting a 'free generator / game hack'. The document body contains the primary redirect URL, which is likely intended to lead users to a phishing or malware download site. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a social engineering lure for initial access.

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.co/app/431946152/generate-free-robux-gnome-game-hack In PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/2021-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/hack-game-roblox-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-a-free-gamepass-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/cool-free-green-shirts-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/millitary-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/my-roblox-account-was-hacked-what-do-i-do_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/code-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/cheat-roblox-lumber-tycoon-2-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/instantrobux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-free-domino-crown-promo-code_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/easy-free-robux-game_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
font_00_sfnt_off00003336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3336 21232 bytes
SHA-256: 1e7b3860d33bb73f68024abfe8822d1dd7e9c31e1144a177bf2718d3595bcc48
font_01_sfnt_off00006143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 19080 bytes
SHA-256: 60c52db9f77781be2504f79a3ab1b55eb8ec4d4261f4717270052376aa88d743

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