Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfdb2e045063699…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 16:31:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 534a77c7e75fb04725f3a1cade781e7f SHA-1: 377ac9013306830c87fd59c649e591f1e0923117 SHA-256: 8cfdb2e04506369959e05509b961dea8e3eb70ce8e86ca01d49820605ef2b1f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary redirector URL is https://netcdn.xyz/app/406889139/how-to-get-free-spins-on-coin-master-2021-ios-game-hack. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/how-to-get-free-spins-on-coin-master-2021-ios-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/rbx-land-free-robux_GM431946152.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_003_off0000481c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x481C 25456 bytes
SHA-256: 2ffd3ff68298b441104fcc4649d31b2b54931bf82d97670b90754e5cc428ee00
font_01_sfnt_off00008276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8276 18452 bytes
SHA-256: 1a65c7fcb9bad972bd4806159ebd9204317f4feb10db53d1e42ac086b2fa499a

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