Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f3c2d8e4c077e0…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 07:11:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 14bc509fcc28334dfb7b1101e79ddbf0 SHA-1: 36bd86e4b48b705a97f89e8ca545943a61422c6f SHA-256: 67f3c2d8e4c077e09d0e6fa1d6b11431ddd5f9cb4bac9694107b19c6b24b8030
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and similar lures. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/835599320/how-to-download-tiktok-free-game-hack In PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/pokemon-go-free-year_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/robux-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/roblox-points_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_off00004e43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E43 27596 bytes
SHA-256: a1529a03f5e4e897d871e6a7a8909160e16f847b3093d42b99de39883eb879ea
font_01_sfnt_off00008bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDF 3124 bytes
SHA-256: b4d0a6f874623eca91bf5bc72a3cabb824ec4e9d69d3f61300b24fcbe1df707d
font_02_sfnt_off00009698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9698 18264 bytes
SHA-256: b6102f5e419b073d6f788ad46642eb2babada397d057191ebef670619ce81d66

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