Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a9c5261f4c123c…

MALICIOUS

PDF

48.5 KB Created: 2021-05-16 09:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7815fa91246f028bd641fad7d46f6937 SHA-1: 6d4496ffbfd414f6ce93748f8b10cba8bf3d177b SHA-256: 48a9c5261f4c123cf4005371527b4616f375fc0757d6626b223585b09f9a9669
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, identified as a link farm, pointing to websites offering cheats and freebies for games like Coin Master and Robux. The ML classifier flagged this PDF as malicious with high confidence. The presence of a 'download button' heuristic further suggests a deceptive workflow designed to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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/coin-master-daily-gift-free-spins-and-coins-game-hack PDF link annotation
    • https://my-private-intendant.com/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/robux-generator_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-hack-apk-iphone_GM406889139.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FD 24948 bytes
SHA-256: 88fa4e7807cbbf3f115c126f34531b89f31bec79f759d77d943c2713acb5dc3c
font_01_sfnt_off00008279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8279 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off0000901a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901A 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0A 18480 bytes
SHA-256: 3ccd0e6e182247473c8fd8a661e1697f212027199d1cdaa086bf60c9e83bc44d

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