Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad091dee124bf11…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 11:28:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c63dc909f75860f7bb404980bf2f2ac6 SHA-1: dae5db446798747aedd25ff51f4aba31fb7c3b08 SHA-256: 9ad091dee124bf11324328993fd25eeb6cc4d2c756f21bbc92f91d043e94855b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links pointing to a known malicious redirector infrastructure, specifically designed to lure users into downloading potentially harmful files. The document body and heuristics indicate a 'game hack' or 'free generator' theme, commonly used in phishing and malware distribution campaigns. The primary IOC is the redirector URL, which likely serves as a gateway to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

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/coin-master-hack-spins-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pubg-300-uc-price-in-india_GM1330123889.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-free-download-laptop_GM479516143.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_off000050da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50DA 24808 bytes
SHA-256: e5c1740767c0a364f04987c58e57da62f695972aefeeb0228ece5e832937c069
font_01_sfnt_off000088b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B0 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off0000924d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924D 17892 bytes
SHA-256: 340cad640208a3f63c565dece8f0e8a86db030e36dd2ab9bf46956c7901539b7

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