Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8ad3cf39a670ce…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 23:54:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1b02c70af297a83727552ebe6660eab6 SHA-1: 0cffce4314f2ccdeff49d702c96b898e50205e65 SHA-256: 6c8ad3cf39a670cecf6d2ee4a649937956e607d5b3dd9b876e46ae2bde96526e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, directing users to a known malicious redirector. The embedded URL https://netcdn.online/app/431946152/free-arsenal-hacks-game-hack is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/free-arsenal-hacks-game-hack In PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-card-link-free_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_off000052c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C6 25556 bytes
SHA-256: 99d7df68b8ff1e3c324d5ddc9e013d0bb64087875be75cb52f85fac905d50259
font_01_sfnt_off00008d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D36 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off000099de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99DE 17836 bytes
SHA-256: d6079491610f92f53a6d508c31b9bd32bc6214f96ff8d9618faef176008c6c5c

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