Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11122a9258b85cb…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 22:31:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7070851d016e4fd63ace91a83edd16eb SHA-1: f3bd61f26418dd24dd6683c0f5b3c905bb179f5f SHA-256: e11122a9258b85cb972f5a206c1415668fddf8d7f2157d0ae4ca17d8509eda55
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users to websites offering free Robux or game hacks. The primary link, https://netcdn.online/app/431946152/websites-to-get-free-robux-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/websites-to-get-free-robux-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-vip-on-roblox-fashion-famous_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/is-there-any-way-to-get-free-robux_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
stream_004_off00005234.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5234 25708 bytes
SHA-256: 8e6b849e413c0071516af8f9bcae1879caf7b3bc49d01c3a214519435735f4f4
font_01_sfnt_off00008db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB1 18436 bytes
SHA-256: 6ab9ab31980840835fbaeca164a74f0e8188db39a6ce5c5e4face3e95ba0b523

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