Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb42516bced29dfd…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 13:08:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 73f8c34dd334d55bce6cd55946c2b985 SHA-1: 7f990116c79cc7c2a2ed473d4d4bf4089b84894e SHA-256: cb42516bced29dfd2f19fadbc39320925a826c470a8921d0dc23a913db4bed7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and further malicious PDFs, masquerading as game hacks and generators. The document body and extracted URLs indicate a lure for users interested in game exploits, which ultimately leads to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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/roblox-natural-disater-hacks-game-hack In PDF document text
    • http://xenonsvjetla.com/files/how-to-get-hacks-on-midieval-roblox_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/hack-all-game-roblox_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/get-newer-phone-for-free-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/tiktok-free-likes-net_GM835599320.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-real_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_off00002eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EED 22612 bytes
SHA-256: b8c7212096f208408be646ff6b8d451d42d1991c265b9d60dcee516330c1f56f
font_01_sfnt_off00006170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6170 19188 bytes
SHA-256: e68740172ce3ac63ead66f1aaaf2dae3d9cc02ef46c00831628f3f90736c907b

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