Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce049637f275d623…

MALICIOUS

PDF

44.5 KB Created: 2021-05-13 02:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 51889f84206c967858bda6e93f2a29bb SHA-1: 8b00dd26dc836e5093efb2348c3b9fc7d94d3f61 SHA-256: ce049637f275d62313fae88f5ad40a58a9ef7d675d6d4c9d86c576cc3f8ccf78
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are SEO-optimized and point to pages offering 'free coins' or 'hacks' for games like Coin Master. One prominent URL, https://netcdn.xyz/app/406889139/free-coins-2021-coin-master-link-game-hack, is directly embedded and likely serves as the primary lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or redirection scheme designed to drive traffic to potentially malicious sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-2021-coin-master-link-game-hack PDF link annotation
    • http://fia.ub.ac.id/katalog/repository/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-earn-free-robux_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A57 24660 bytes
SHA-256: 854708efd716a29df3da52f08c89fb15493988a4469c2b8ba3529663e47883ae
font_01_sfnt_off00008189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8189 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3B 18284 bytes
SHA-256: 44e7f09bb3e55560ed6b3e28d1dba29242186833d4e458deb15a61ccc134217c

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