Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca2387198eb41b3…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 07:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e259386a3ad06406acc4cbbec78b89fc SHA-1: 050f5f0ef67981fd586a1dcffad0a55e65f0a0da SHA-256: 2ca2387198eb41b3714ff826036291426dcc3f9d65970bbf28af0a7d852e67bc
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links designed to lure users to external sites, masquerading as generators for game currency or hacks. The primary URL, https://netcdn.xyz/app/431946152/how-do-i-get-robux-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a link farm strategy, likely to drive traffic and potentially deliver further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/how-do-i-get-robux-game-hack In PDF document text
    • http://arkivthy.dk/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-more-spins-on-coin-master-for-free_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
font_00_sfnt_off000047c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C4 26852 bytes
SHA-256: 2cbee5031d5ed43c6bc74ee4ff7a0d060e39833ebf8eed4513638292699928c7
font_01_sfnt_off000084de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DE 18284 bytes
SHA-256: 76696481b4f85a4b134e50273d4f72d60bf885136cdb061a204ba21e520483fb

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