Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1228748d3a25d73…

MALICIOUS

PDF

33.4 KB Created: 2021-07-07 19:25:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d961cd7ba6e265aeaab9e67b1d9377ec SHA-1: 5ef38804bd8242281da28a4c8a38eed5239c3b04 SHA-256: d1228748d3a25d73c4da6ea89a3fda0e7c01007aed4e065a98461b20bd393892
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a 'free generator / game hack' which is a common lure for malicious content. The document body and extracted URLs reinforce this theme, pointing to various game hack sites. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest a social engineering attack aimed at tricking users into downloading or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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) 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-spins-coin-master-app-ios-game-hack PDF link annotation
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hack-extreme-injector-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-speed-change-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-pets-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-boombox-roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hack-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-codes-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/boku-no-roblox-remastered-hack-script_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-card-codes_GM431946152.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
stream_002_off00002e34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E34 22456 bytes
SHA-256: b1be895d6f28ecca0e656fe36d9e9aa53e62034515cc71ad2d94df59db8cdc5b
font_01_sfnt_off00006051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6051 18176 bytes
SHA-256: 7a04ea1322d73f03f7683815be4e9f004787eae7d1b28008924f19d2df70de81

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