Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67e61bfeca6b817…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 08:04:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4d503acd4055bbe475b5a718ecf1f316 SHA-1: 0fcf6f8d87d036e5470a8ce99b650b3646515235 SHA-256: e67e61bfeca6b817f064bf10d3ae906f10f9acf3527b4c9de376bf02a9df38f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The ML classifier strongly indicated maliciousness, and the document body confirms the lure by embedding URLs related to popular games. The primary attack pattern involves tricking users into visiting these malicious redirectors, likely to download further malware or engage in credential harvesting.

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/406889139/coin-master-free-link-today-game-hack In PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://dohafashionstores.com/uploaded_files/userfiles/files/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.dohafashionstores.com/uploaded_files/userfiles/files/roblox-hack-app_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
font_00_sfnt_off00003284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3284 22336 bytes
SHA-256: 700055d370a06cfba7ed9a31867cc4167d3049104426e69070d8d68285d6f199
font_01_sfnt_off00006438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6438 18524 bytes
SHA-256: a920f55f025afea5015e120a5f5dfdf37c8d5d267cdc7def099919dbf31b76fa

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