Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d958a83ea50b893…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 12:55:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 48ff7afc61cedda3c876cfb010a4b966 SHA-1: 3b2800581637198373c0ee0ccea9cd93e86fe7aa SHA-256: 5d958a83ea50b8937390bbee49820d5296c2c12c3daea2b55fae9ea6e0b6f32e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one specifically for a 'free generator / game hack'. The document body, though heavily obfuscated, contains references to game-related lures and URLs. The primary function appears to be redirecting users to potentially malicious websites, likely for further exploitation or credential harvesting.

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/free-op-minecraft-servers-game-hack In PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.iain-padangsidimpuan.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://www.semrush.com/prices/In 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_off00005150.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5150 24864 bytes
SHA-256: 2ed32054da4e31afa179c92d0a6b00631d6c147acc7abee463d95eeee8e2df06
font_01_sfnt_off00008a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7B 17856 bytes
SHA-256: a77b7ff2a68dfc8683e01ffa7febdd478081a7961822aa2eebc6e1611696765c

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