Malicious PDF — malware analysis report

Static analysis result for SHA-256 19299a462e3fceac…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 14:04:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 154109b1991174d2eba12b475a45d610 SHA-1: 1cbed54c54baf106f56ed345d5c48840e0455336 SHA-256: 19299a462e3fceac78f55c4427b08cabe193f4c369fd0cc03a5512c84c375fcc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.online/app/406889139/get-coin-master-free-spin-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/get-coin-master-free-spin-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-generator-without-verification_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_off00004eca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECA 25776 bytes
SHA-256: 3fef1c23157233f7d54e682ccc252cd40049d8cd568ec5ab9d3497c5d1be170b
font_01_sfnt_off000088c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C4 3204 bytes
SHA-256: b7fe42cb1da39e96c756399b3532633df029c1fbb3443b9e17d98df25c90dc65
font_02_sfnt_off000093c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C8 17884 bytes
SHA-256: e2d35692e43efa734225fccc8f864e809a8787bafbe3710f48ba51a9ce51e9b4

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