Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddd3f63ad19008f…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 09:06:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8d7bea7d95f795be62b3fbe24b7c22c5 SHA-1: 91586c1f80baaac116240a0ff349ceb8916669ea SHA-256: 3ddd3f63ad19008f2de464534c5c18de5b2ed8c8fbbeb901f31f532aa3f14f5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-free-spins-link-deutsch-ios-game-hack. This suggests the document is designed to trick users into visiting potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/406889139/coin-master-free-spins-link-deutsch-ios-game-hack In PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/pubg-uc-website-india_GM1330123889.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E3C 25000 bytes
SHA-256: 0a7d3e6a1ce19d1eb7262f7b02325b2a65245d90c5f10a61bbe42feb8ddc44e6
font_01_sfnt_off0000876e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x876E 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off0000910c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910C 18528 bytes
SHA-256: 7175abba28d978b4edd32102cbe55dc5ea5b56fd80137f2bac6bd07f05acb141

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