Malicious PDF — malware analysis report

Static analysis result for SHA-256 04482cae77ed09b7…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 17:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2e31aaaa7b3f09a3c50e27e968b21856 SHA-1: bd9b6250478a2cd6ec1b67158388513d1922e007 SHA-256: 04482cae77ed09b79abc12a7f75c7ab376e7205b6f3f5b39e287885b6e5dcd87
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains malformed streams and links to known malicious redirectors, indicating an attempt to exploit users with lures for game hacks and free currency. The primary URL, http://netcdn.co/app/431946152/free-robux-real-without-email-needed-game-hack, is a critical indicator of this malicious redirection. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest exploitation for client execution, likely leading to further malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 http://netcdn.co/app/431946152/free-robux-real-without-email-needed-game-hack In PDF document text
    • http://daskrimti-jabar.web.id/library//repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-download-roblox-apk_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/rthro-packages-free-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-use-cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-quick-and-easy_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-robux-legal-free-bekommen_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-a-free-boombox-on-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-giveaway_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/master-free-spins-and-coins_GM406889139.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
font_00_sfnt_off00002dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDA 22524 bytes
SHA-256: 45875223ecea3f6b7561e1c0d9ed4209cab06a618414439c38f5070e924495b4
font_01_sfnt_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 19812 bytes
SHA-256: 01a014fda95e68bc7518cd5aed02f5922b3c70fa3c22c21d317d5b3cbd02e579

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