Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e48d48a9a80a7c…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 19:20:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d877cfe8b0d848621a794f328cf70983 SHA-1: 82c0d1c76f142ed6ff3fbc87b7774d70d434e5a8 SHA-256: 47e48d48a9a80a7c397361109ad419fa7d6ceec94fa0fd2bc49ddeb009c4e515
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.online/app/431946152/free-roblox-accounts-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful content.

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/free-roblox-accounts-2021-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-pokemon-go-fest-free_GM1094591345.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-skin-free_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_off00005255.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5255 26588 bytes
SHA-256: c2b52ba2b3e576bed7b1fdfd13a31bba24c65031cc3cf00fcb210b271b1d5cc0
font_01_sfnt_off00008f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F35 18596 bytes
SHA-256: 22cfe7717cbde525e358518c643d16773849ea10ba84c2e1869734c310f91593

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