Malicious PDF — malware analysis report

Static analysis result for SHA-256 576339c673a8b7bc…

MALICIOUS

PDF

50.4 KB Created: 2021-06-11 09:01:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 32ae715fc4542d1fb8bdcc895c308400 SHA-1: fb91ad2eb880bcb68b042c2361b74ac749c1dd66 SHA-256: 576339c673a8b7bc2f03d19c0ab70ce3f981b5f7737add3015d8fe6feb830dac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body, though partially corrupted, contains references to 'Minecraft' and a URL that aligns with the lure. The presence of embedded URLs and the ML classifier's high confidence further support the malicious nature of this document, likely intended to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/479516143/minecraft-on-computer-free-game-hack In PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/free-robux-xbox-one-2021_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/roblox-field-of-battle-hack_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/indian-gamer-roblox-ninja-legends-hacks_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/free-robux-appcom_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/roblox-studio-free-online_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/beyblade-evolution-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/roblox-free-tony-stark-tshirt_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/royal-high-school-roblox-how-to-gwet-free-mony_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/site-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/free-roblox-cards-live_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-easy-method_GM431946152.pdfIn PDF document text
    • https://www.carela-group.com/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-free-download_GM479516143.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_004_off00005409.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5409 30152 bytes
SHA-256: 5414f491e1aef223c157b65317ae48f0329c0502cf0db7cca6e0f0863db1dde6
font_01_sfnt_off000097e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E7 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off0000a292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA292 18284 bytes
SHA-256: ce17ca81234478eae2e4d5d82743db6ecf39d6315d037818deed1e54c2e5b17b

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