Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69451451c8f3698…

MALICIOUS

PDF

231.4 KB Created: 2021-07-05 12:12:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 89797d7610bae8bca1533005a45ac549 SHA-1: 133dda0a0daf7f2018dda92077094891105219c2 SHA-256: d69451451c8f36982faea56a6a45c79cfe331dc2813155fefd46fd1ded8a1fd7
142 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, specifically advertising a "free generator / game hack". The heuristic firings indicate a malformed exploit stream and a malicious redirector link, suggesting the document is designed to exploit vulnerabilities or trick users into visiting harmful sites. Although no scripts were explicitly extracted, the nature of the exploit and redirector points towards a common phishing or malware delivery lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2763

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.
  • 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.
  • 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.tw/app/1330123889/are-pubg-uc-free-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/nre-roblox-adopt-me-hack-script-money-glitch-tizi-artizi_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-in-asssin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-computer-only_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-generator-no-verificationor-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/tiktok-fame-free_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-prison-escape-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/comment-hacker-roblox-accesoir_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-100-life-free-for-roblox-pinteres_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-use-cheat-engine-on-roblox-undetected_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-codes-2021-on-ipad_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-engine-64-roblox-2021_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037c93.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37C93 11713 bytes
SHA-256: f84a44360767cc4d8cedbde4be720b527cd77dc3137c25cc151af96c43d2f1d0

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