Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd98aa59e5c5fa3f…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 23:53:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1d05f6387549d278e9d5cd6c04e3f7a4 SHA-1: d0cef0da54695680788a23297a53595ce7e7ed3a SHA-256: dd98aa59e5c5fa3f0ead1c08dc205dd5319806560680eab81307c9fdbd82e212
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with themes of free game items and hacks. The document body, though partially corrupted, contains a URL that aligns with the heuristic findings. The presence of embedded links and the overall theme suggest an attempt to trick users into visiting malicious websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/daily-free-spins-for-coin-master-game-hack In PDF document text
    • https://naturenz.vn/public/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-spins-coin-master-hack-2021_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_003_off00004b05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B05 25260 bytes
SHA-256: f959206d3b15abb407f428eba713b22dc8c2e2887fefe7105cb7a6b2b6e7e211
font_01_sfnt_off000083e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 18308 bytes
SHA-256: b750d5a8b44caccc122b2ff8294eb9307e18e87e3916697a2a7f0c063c77f291