Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02bcafb8122792e…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 18:40:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b155e5d886ba255a4dcff2ddc4f35990 SHA-1: 79dcc979ad0327fed444286b626b20cf8a2b9c75 SHA-256: e02bcafb8122792ec468207f8ac18d37bdc2bbdd50f5985961b3cb2f693b4ebe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-generator-codes-game-hack. The document body and heuristics indicate a lure for free game currency or hacks, designed to trick users into clicking the malicious link. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for further malicious actions upon redirection.

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/431946152/free-robux-generator-codes-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-vehivle-simulator-speed-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/cheat-engine-roblox-bypass-zip_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/sipo-fun-robux-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/hacks-that-work-for-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-generator-2021-download_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.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_off00002dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCB 22364 bytes
SHA-256: ee0562ca1da738dbb47bac97814193dfb8779e4930ab1dc9e6e5fa4447e26200
font_01_sfnt_off00005faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAF 18996 bytes
SHA-256: 91c816d1018d58562acf1f6be5737a46a508402ca9fb9bb64fdd640b276a109f

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