Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b595c5467850e3e…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 07:06:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 169d04cf5ae0b696aaae202b55ae319b SHA-1: 6af2d0833a11a0b592f50e811ff05a60421907b0 SHA-256: 1b595c5467850e3e33cf1f2494dafcd3c72f2aee8001b2812341ebcb0a445092
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game-related content. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a lure to download potentially unwanted or malicious software, likely distributed via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/479516143/minecraft-free-ios-2021-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_003_off00004943.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4943 26336 bytes
SHA-256: 1abf1caf248b1d2769dd8f7307f49fe9478e0de4e375bd5809c51688487e5c95
font_01_sfnt_off000084cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CC 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB6 18112 bytes
SHA-256: b55c1404a277e69c847ae3cf6ace6563469f03eb0031cfae1db94f462975a683

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