Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c69314b6e85414…

MALICIOUS

PDF

38.0 KB Created: 2021-07-03 20:22:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d24e30527ddb3405060aa9728fac9365 SHA-1: ea36413f272921dfa1aa5f13e8f8c6dc71e84718 SHA-256: a1c69314b6e854141e8ea2770cf1f3eb134da0f74bbeaf50cf063ba469ed1f7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs social engineering by promising game hacks and free currency to lure users into clicking malicious links. The primary link, http://netcdn.tw/app/406889139/coin-master-app-hacks-game-hack, is identified as a malicious redirector, likely leading to further malicious content or downloads. The document's structure and embedded URLs suggest an attempt to exploit user interest in free in-game items for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/406889139/coin-master-app-hacks-game-hack In PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/how-to-get-roblox-gamepasses-for-free_GM431946152.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/robuxe-gratuit-site-de-hack-roblox_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/roblox-business-simulator-cheat_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/roblox-how-to-hack-into-gallantgaming-accounty_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/easiest-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/roblox-swordburst-2-speed-hack_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/daily-coin-master-free-spins_GM406889139.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
stream_002_off00003437.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3437 22996 bytes
SHA-256: 05c3808b6f5c43a693216e823ae4912fe18de46fb7ded445683c771660426e82
font_01_sfnt_off000067ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EF 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off000071d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 18180 bytes
SHA-256: 7da720255189ee7148b3a15459f8235b370ac0c6f406201341355dab7c471ca0

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