Malicious PDF — malware analysis report

Static analysis result for SHA-256 5181e6ec63b05359…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 05:37:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4eb5f305df0c5d3c764db19464147738 SHA-1: defbc06907e55b98840738bc21ecfd370dbd5272 SHA-256: 5181e6ec63b05359693e36f9cc3803e54fb40643b2b35816b3629b5ce94ba159
160 Risk Score

Malware Insights

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

This PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/431946152/how-to-hack-in-arsenal-game-hack. The document body and extracted links suggest a lure for game hacks or cheats, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-hack-in-arsenal-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/tiktok-free-view-iphone-horizontally_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/add-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-hack-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/comment-hack-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.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_off000031cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CD 21900 bytes
SHA-256: 0c3e48adde372dc3ee836de56248276ab61d97d35ee07e219afab1f6b50b67b2
font_01_sfnt_off00006186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6186 18452 bytes
SHA-256: e830d4d2850352ff681c802b50bfdb69e36cdf0dd9a2fca6f972fc848603048f

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