Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0813f7320be84e3…

MALICIOUS

PDF

41.6 KB Created: 2021-05-10 17:43:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4e493c36c7804890759ba6050cd74765 SHA-1: b6ea69526f0893ed7aa0c0f7e55de46a74df9a33 SHA-256: b0813f7320be84e35a0b7e905a6b3346e557701c9d5485ccd55736b3cc1fed3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics suggest a lure for free game add-ons and hacks, likely intended to lead users to malicious content or downloads. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, and the presence of malicious links indicates a high likelihood of a malicious workflow.

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/479516143/free-minecraft-addons-game-hack In PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/picture-roblox_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-get-more-spins-on-coin-master-hack_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_off00004a1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1A 24212 bytes
SHA-256: 9f60bdfb98acb8827490e9d4879c474201a1102e0888381445e4b483a0aa0f8d
font_01_sfnt_off00008152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8152 17884 bytes
SHA-256: 2acb4cd1bca1b5a723691e5edbd5eaf48ec188cda9d27986775bd20f5f6dc65a

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