Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0de156dd27e258e…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 10:51:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bfe5b2d48dfacc5acdbd2c50118abf9a SHA-1: 84c68ba03e897e7e4c1801b09589dd7e5177e929 SHA-256: d0de156dd27e258ef6c8384011f847a284bdee61c945f9dffd539c38fc0c508f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and malicious infrastructure, disguised as a lure for free Robux or game hacks. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this. While no scripts were explicitly extracted, the document's structure and embedded links suggest it is designed to lead the user to a site that may host further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-robux-on-iphone-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/robuxhub-net_GM431946152.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_off00005316.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5316 26028 bytes
SHA-256: 68e2feeb0e78a855e26c18938ae77ac36b7ccb0e35df65de79dbdd31d42e17df
font_01_sfnt_off00008ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBC 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCE 18356 bytes
SHA-256: 09002ce3ba94cfa5154e24d4605185e25e9b5ae3e76d565aeacf431b5bbbf1e5

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