Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e4f24126cd1bcd…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 06:14:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6127b56fe619daf765f1a7e74b34ae4c SHA-1: 2d192c2f4a0c54ec71c3e6ad1795dfdbebf7a9c6 SHA-256: 92e4f24126cd1bcd377e231f257b3e05a5997c93964b24f7f31c9a4827a16335
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game currency or hacks. The primary lure is 'Free Robux That Actually Works', directing users to a URL associated with known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-that-actually-works-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rbxdemon_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/make-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000522f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522F 24964 bytes
SHA-256: 6dea2a89970fae52b535861c1b15c9fb115eeb28a408d5a48ff929bf0ba802dd
font_01_sfnt_off00008b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B40 19136 bytes
SHA-256: e9e8736bed1826902485352f20294e96b644ee357cd6186db79dc9b33c578c67

Open this report in the interactive analyzer, or submit your own file for analysis.