Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d2bda55a163fd8…

MALICIOUS

PDF

46.0 KB Created: 2021-06-11 01:08:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e776ede6ba919ebacaf415c277a3689e SHA-1: 39589afaf4016bb9279296ecc2a328a8ca2e60d4 SHA-256: 92d2bda55a163fd808ba814c3a2e556784904a3566ea638ef2bfb79be72683f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and free virtual currency. The document body and heuristics indicate a lure for potentially unwanted or malicious content, likely intended to trick users into visiting the linked sites. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/roblox-hack-script-list-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pokemon-go-free-zangoose_GM1094591345.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/can-you-still-make-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-jalbreak-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-roblox-on-mobile-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/tiktok-free-to-watch-online_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacks-to-get-free-robux-on-roblox-in-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-hack-2021_GM479516143.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_004_off00005458.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5458 25884 bytes
SHA-256: 68d5d5fd30387c92b79dad81638b1f3e6f0eca6b2c7e748d3b65724897fdc0ab
font_01_sfnt_off00009026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9026 18580 bytes
SHA-256: df4c17f0b3fccf7795a55029f5918dfdb39da93fa911d4e6c5fab99c1c9d33c3

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