Malicious PDF — malware analysis report

Static analysis result for SHA-256 bacbbdeb1dd58eb5…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 00:32:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 07ef34c6e02249a830e52102d07225ee SHA-1: 280187609b84e6ad347fc78ed7eec8e4fba7480a SHA-256: bacbbdeb1dd58eb576cac040abcb573e8d5f0ef227472ec3c30539f770adb40f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'Roblox Robux Hack 2021'. The heuristic firings indicate that these links are associated with known malicious redirectors and are designed as a lure for game hacks. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

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.co/app/431946152/roblox-robux-hack-2021-xbox-one-game-hack In PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-do-you-get-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/rbxp-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-get-free-robux-no-wait-works-proof_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/robux-free-co_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/robux-game-free_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-hack-on-roblox-jailbreak-into-police_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-get-free-robux-on-ipad_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_off00002fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE3 22356 bytes
SHA-256: 7cf75189e81ab6e792f1dbe6adff5b83f17944c1a2e75daf1faf1b6f1b57e953
font_01_sfnt_off000061bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BC 19200 bytes
SHA-256: 6eea67e6924217fad3a8095972acf431d9ef2f794dae69d5027f32dffe17af46

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