Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc810a51a7748c7…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 00:36:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4f8a4e2d23c88eb5fd2251976fda757f SHA-1: 69e888e05c25c663d1e2fc62c4790dd4987d16cb SHA-256: 0bc810a51a7748c708fb5fd43aea333f544d45e300506e285528da1aa3a009dc
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which are disguised as game hacks for popular titles like Roblox and Coin Master. The primary URL, 'http://netcdn.co/app/431946152/how-to-hack-someone-in-roblox-without-their-password-game-hack', and numerous others hosted on 'lib.smklabor.sch.id' suggest a link farm designed to redirect users to potentially malicious websites. The presence of a 'download button' lure further supports the intent to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.co/app/431946152/how-to-hack-someone-in-roblox-without-their-password-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-2021-real-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-script-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-2021-december_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/im-using-a-hacked-clinet-music-id-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-gift-card-code-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-see-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F78 22236 bytes
SHA-256: 94ba3ca783214c816e55cd224e6317d0d6a0f2e992d12a76912c0234b32f7b31
font_01_sfnt_off00006066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6066 20136 bytes
SHA-256: 8bdef454ab978dade1417c6476cb71f40131c0f6c129f460a29cd2ce682aaccf

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