Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb29bbec9c9679f…

MALICIOUS

PDF

37.4 KB Created: 2021-07-03 13:20:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3501ac39987914fca320faf50e1e7e91 SHA-1: 0cc106ac4a8d15fcb0a69cc7606cf2f384c62103 SHA-256: bfb29bbec9c9679fc7fcc77865ea6b694d23bb64abac357ecbb49eca912c1237
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free generators, as indicated by the document body and heuristic firings. It contains multiple embedded URLs that redirect to known malicious infrastructure, specifically http://netcdn.tw/app/406889139/haktuts-coin-master-free-spin-today-game-hack. The presence of these redirector links and the ML classifier's high confidence score suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/haktuts-coin-master-free-spin-today-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/pastebin-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/cookie-hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-adidas-hoodie-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-bloxburg-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-download_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
font_00_sfnt_off00003260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3260 22340 bytes
SHA-256: f1fdc9b70aefcc485e90d593935aadc01996aadd104cd41699f59547978372dc
font_01_sfnt_off000063e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E9 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCE 18840 bytes
SHA-256: 972c50e57b5d8bef4e8a1a4d64318d2c4a5eeb25991c57ca0d9be4dff359939e

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