Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec27e32ae7a0bce1…

MALICIOUS

PDF

44.4 KB Created: 2021-05-11 05:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 70e340ff8fd17b584cd44b8ffba889fe SHA-1: 14856ec59d30b6f76a2fe12eaa819df0a9e754e6 SHA-256: ec27e32ae7a0bce1987f34cce0caf62c3dbc51a60a5fd31c416afbc4de1eb814
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and a large number of external PDF links, indicating a link farm designed to drive traffic to potentially malicious sites. The primary redirector URL is https://netcdn.xyz/app/406889139/get-coin-master-free-spin-game-hack, which is associated with 'game hack' lures. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious intent to redirect users, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/get-coin-master-free-spin-game-hack In PDF document text
    • http://lib.untad.ac.id//repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/apps-that-give-you-free-robux_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_003_off00004811.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4811 25456 bytes
SHA-256: b3e928d1f78603ab459063fb2ab59a716c30925afbe7a829bf8574cb8f111c7d
font_01_sfnt_off0000824c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C37 17884 bytes
SHA-256: e2d35692e43efa734225fccc8f864e809a8787bafbe3710f48ba51a9ce51e9b4

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