Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f05eac151aa2e3…

MALICIOUS

PDF

54.9 KB Created: 2021-06-04 01:52:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c9da5c5f0a0977f16466220ed659bd90 SHA-1: 3cd9f604ea9abef450c8fa39e5f1a9e16a4ec41c SHA-256: 92f05eac151aa2e39abb2c456b6a95a7a3c81ca8e024b44379748a01ea57c801
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" and "generators". The primary link directs to netcdn.online, which is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead the user to a malicious site, likely for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9497

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/479516143/minecraft-building-hacks-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/pokemon-go-free-eggs_GM1094591345.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005130.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5130 25548 bytes
SHA-256: a27037c5b9dc4cb15f0320ab1951426b6c3f87c31e65e71d07c0d4467895900f
font_01_sfnt_off00008b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B85 7936 bytes
SHA-256: 038829bc81e15b6024d2a75b24b2b95e916dd2d8797e4f87b867de59d61698ef
font_02_sfnt_off0000a4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AF 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000b33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33B 18628 bytes
SHA-256: 03be4b6b10a4c687c6c89c16a3bf013511456428a76c01e3ee63370f4522cf94

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