Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5bc0800ab64f45…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 19:30:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3fa763e6f5999a9cb1b7914474b22032 SHA-1: 383f9d791f774e37bd622b7253fb0e055b68d9e7 SHA-256: 6b5bc0800ab64f45dc68616ce9a75579323288ffb3563aef1cc864855a4d89e4
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure appears to be related to "Coin Master" and "Roblox" to entice users to click on the malicious links. The document body, though heavily obfuscated, contains references to these lures and the primary redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/coin-master-spin-ml-link-game-hack In PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/roblox-download_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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
stream_004_off00005033.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5033 24496 bytes
SHA-256: 798c5211208dcc78ba89b455bfb8a701a4377c0c25233ea81a6fa8d05590639a
font_01_sfnt_off000087db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DB 17968 bytes
SHA-256: 1ea15ab14cfacca10647eaa7b498244bedd2cc0f2a90ac180f194b2e1ff76db6