Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c28304253173a77…

MALICIOUS

PDF

50.0 KB Created: 2021-05-12 09:33:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 17a389f209c5b5570396e3dd4cccded0 SHA-1: acdb044b8bf89458b3a70926bac4ebb0458d1692 SHA-256: 7c28304253173a773e796f6166e39f8b27aa68a524fa68ca97c61afcaf8c74d5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'game hack' lure. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-ios-hack-game-hack, is identified as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to direct the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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/coin-master-ios-hack-game-hack In PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/rbxdemon_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D97 24868 bytes
SHA-256: 0dbd6b54f116e3ed83a42e0f4a451fc862a73ddf1905940f4a44d8ce581a23ef
font_01_sfnt_off00008626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8626 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off0000903a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903A 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off0000a253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA253 17716 bytes
SHA-256: b284cc0a3260b800c0eb101cd03c26d28dcaee11de2dc9fb598807f0165498ee