Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aad96fd56a10ac6…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 01:05:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4db4b63d34addac63d36baa756343488 SHA-1: ef2c547788a9e55b0a5aeb4faf7acd4b78d6f0fc SHA-256: 0aad96fd56a10ac6daf8128cb40a69b312eb7cb8cbc246503a82e3180d2a42f6
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external resources, including a known malicious redirector. The document body and heuristics indicate a lure for 'free generator' or 'game hack' content, combined with a fake CAPTCHA prompt to trick users into clicking these links. The primary malicious URL identified is https://netcdn.online/app/431946152/hack-robux-game-hack, which likely serves as a gateway to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/hack-robux-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/can-you-evolve-trade-pokemon-without-trading_GM1094591345.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005159.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5159 25028 bytes
SHA-256: 63bb98d7122f43078a53a4f0e4a2b43fc005ae2dc165082afb257d81284cc0c9
font_01_sfnt_off00008b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8D 18248 bytes
SHA-256: 9805bb7d0eadd4beaac6fd3b5d5d8b6e8e5d33c97ce909732e364f826719e5d2

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