Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19495d8a0add9d6…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 12:33:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ee38243e0549e3c32a2f8c5043359e84 SHA-1: de226b4e6721da0122672a0c444479e37149e112 SHA-256: f19495d8a0add9d6c9d3dd3c4af221a9c23ffa79aa95148f6e7d07fbf7b8fae4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, such as 'apk-hack-coin-master-game-hack'. These links are designed to trick users into downloading potentially malicious files or visiting phishing sites. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/apk-hack-coin-master-game-hack In PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/roblox-admin-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/how-to-get-free-robux-2021-ios_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/how-to-hack-on-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/how-to-get-free-robux-no-joke-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/free-robux-roblox-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/robux-free-free-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/baldis-basics-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/roblox-parkour-cheat-point_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/the-game-of-roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/roblox-cursor-hack-lock_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/free-tiktok-followers-500_GM835599320.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/legit-coin-master-hack_GM406889139.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_002_off000030dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30DD 22636 bytes
SHA-256: 302b94793d2474f27fa8d9dd77c05ac4b80e5c7764e666db8d2eae9af6584caa
font_01_sfnt_off0000634d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 18180 bytes
SHA-256: bbc4eac059efcf8bf1e74c2581f3a6bb8c6757dc141f09cf3b32e8008e1b5aa4

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