Malicious PDF — malware analysis report

Static analysis result for SHA-256 019f23602e9ba22a…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 07:42:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0b2ee6ab55d8aa1387baadb48a687475 SHA-1: 954a92a77a1719269b5aa1dfd70a1fd032f02acc SHA-256: 019f23602e9ba22ae2de08bcae9b358392770b05e39c5d79523604e5afb479ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and heuristic firings indicate a social engineering attempt to redirect users to potentially harmful content.

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/406889139/static-moonactive-net-free-spins-game-hack In PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/spins-coin-master_GM406889139.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_off00005286.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5286 25120 bytes
SHA-256: ee89a1a772dd753ef17e709672b0f6cb62e24e66a60394030d01da27f84ba5ec
font_01_sfnt_off00008c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3A 3560 bytes
SHA-256: 9d03f7c6c62ba3e7fdc0441e9d982a863b2b60b781165d6920512f68ecc4a440
font_02_sfnt_off000098c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98C1 18000 bytes
SHA-256: 550c58a86183c192f11bd993c378cabcbb9cb434b0a2a3ed80188f155553ce19

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