Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d777bda873974d…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 03:43:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 23310a0dc998ea0685aeaab80f9867b2 SHA-1: 1a6d41db4b6186e60232d8ec426fa6ba0f2b8438 SHA-256: 60d777bda873974de72d7a95778d2a19744490c1641ddefd3ff592f51b344270
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a generator for game hacks. The heuristic firings indicate this is a lure for free game hacks and a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive users to malicious infrastructure, likely for further exploitation or phishing.

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/free-coin-master-hacks-no-verification-or-survey-game-hack In PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/roblox-script-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/invicibility-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/vehicle-simulator-money-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/online-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-roblox-tycoon-games_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/avatar-animation-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/roblox-hack-synapse-x-free-download_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/claim-free-spins-coin-master_GM406889139.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_off000033bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BB 23564 bytes
SHA-256: c651e7e2543e82e2a10899219f7c07b13d289dc13a955e73f0fed066ffda0b56
font_01_sfnt_off00006926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6926 18736 bytes
SHA-256: 5d883fbcba549dfc85d89aa60b08e322daf07c64f3e12c438afec793678b6e16

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