Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65c53c6665436dd…

MALICIOUS

PDF

40.9 KB Created: 2021-05-30 19:40:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0565c1369d316cc46e092b0d5ab47455 SHA-1: 4fe818acb14987d468ebc9f4d85f6a81ae37545a SHA-256: c65c53c6665436dd8a9f46b8e3f6523f8a534b3fcc58fcd63f1fd16d0f5d67ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at 'https://netcdn.xyz/app/406889139/free-coins-and-spins-for-coin-master-game-hack'. These links are presented as lures for 'game hacks' and 'free coins/spins', indicating a social engineering tactic to trick users into visiting potentially harmful sites. The presence of multiple redirector links and the ML classifier's high confidence score support this assessment.

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/free-coins-and-spins-for-coin-master-game-hack In PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://barcelonahealthhub.com/wp-content/uploads/fsqm-files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A4 24220 bytes
SHA-256: cd4895e90258a3740065cc79338ba7927158d88b07757017f712392b3177c4d8
font_01_sfnt_off00007e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4D 18060 bytes
SHA-256: f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120

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