Malicious PDF — malware analysis report

Static analysis result for SHA-256 453dcff698633e2f…

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 21:05:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6c5a980bf593e261e6455c13836dbda9 SHA-1: 1c5a653488610d108486f6d6d0e9749ab305235b SHA-256: 453dcff698633e2fb8db58c8c6e8b958b6ddbc8acf784100c10222fc058fd3a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, masquerading as free game currency generators. The primary lure URL is https://netcdn.xyz/app/406889139/feb-23-2021-free-coin-master-spins-game-hack, which is associated with a 'game hack' theme. The document body and embedded URLs further reinforce this social engineering tactic, aiming to trick users into visiting malicious sites.

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/feb-23-2021-free-coin-master-spins-game-hack In PDF document text
    • http://kontaktadig.se/images/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-without-verification_GM406889139.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_off0000487a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487A 24168 bytes
SHA-256: 7cb7af567a32eda0b4e2ca4c837848846f8bf0a9121bcf588feab8d3e2d70007
font_01_sfnt_off00007f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 18620 bytes
SHA-256: e4df661a92880538668b358c87f5272d6176bbf79a36016d2a0b4349a414f314

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