Malicious PDF — malware analysis report

Static analysis result for SHA-256 9845c998a6d2ac2e…

MALICIOUS

PDF

44.9 KB Created: 2021-06-04 02:36:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 14c250a3913d5c212b4690de32bb43b3 SHA-1: 8bef3e2f066bfc1857e5c7c2f5331a1d5e44e0ac SHA-256: 9845c998a6d2ac2e257ab30a47b2631b428968e6a3ea0e123cb21ff0dc625fb8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, masquerading as game hacks or generators. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates the primary lure is to trick users into clicking these links. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to download a second-stage payload or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/how-to-get-minecraft-for-free-on-pc-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pubg-uc-myanmar_GM1330123889.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-followers-on-tiktok-no-human-verification_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-cracked-apk-free-download_GM406889139.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_off000055da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55DA 24728 bytes
SHA-256: e5c483d56ddc99f8fb110a75ffa201f281b8b4123664da2c91f6f62a57453868
font_01_sfnt_off00008dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCD 18028 bytes
SHA-256: b9422edf84f92072c73e95211b34a92c0a0e69f845a714fee2d613fe1b4264b0

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