Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1fa57cafcb554c…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 14:15:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 403effddfacb2cbcd3d02de6f07b2d5d SHA-1: 57b8acf066dd83f5fd1a1a0c543e5a8e689130d1 SHA-256: bc1fa57cafcb554c689f23c7e8c5ade881f76d3ca624cbc2ed77805d8e9b2ee4
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to a known malicious redirector, specifically designed to lure users into clicking on what appears to be a game hack generator. The primary link, https://netcdn.online/app/431946152/get-robux-game-hack, is indicative of a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit user interest in free in-game currency to redirect them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/get-robux-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000502f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x502F 25208 bytes
SHA-256: 30c374dd44b45f6513ccb351f15bc2ed017e126de8ae56dff0ef4c84fdb27299
font_01_sfnt_off000089da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DA 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000096eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EB 17952 bytes
SHA-256: a34a0f77aa554f5c92185b6c86909c5f9e39b3171f9efb4f2c073b614301e128

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