Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e6fa37c912e1e4…

MALICIOUS

PDF

41.0 KB Created: 2021-05-20 01:24:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 076cd9efccc044eda3de53a6a3a3f59e SHA-1: 8e86628cf6140e020ee69aaffd612a61904ba623 SHA-256: 38e6fa37c912e1e4dd450cbafff0fba56db93cd515c3151f4e380f2a2bf4afcf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure URL is https://netcdn.xyz/app/431946152/get-robux-now-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/get-robux-now-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/tiktok-free-wala-video_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-only-1-step_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_003_off0000466f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x466F 24392 bytes
SHA-256: df8c60851f1d5ff9f7de160cfc28df74ffab5dc2da80c208ff97135fdf1abd2b
font_01_sfnt_off00007e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1D 18120 bytes
SHA-256: 9c3ce8d7b0d85fdff3917ffd210604c934acd68a905ece7635225fd3f48c16bc

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