Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae38aadf2a8259d1…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 07:41:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f871420a40ff1d0a772640cb8fd61ccb SHA-1: 1b3ab6ebd26dac51af4d37583119874b53165fd6 SHA-256: ae38aadf2a8259d1f8bc73d0c9f16d58d3d13505b61234c92cc305280252fbc5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains embedded URLs and heuristics indicate a brand-impersonation credential phishing lure, specifically impersonating Facebook to promote free Robux. The primary URL, https://netcdn.xyz/app/431946152/robuxfree-con-game-hack, is presented as a call-to-action. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/robuxfree-con-game-hack.
  • 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/431946152/robuxfree-con-game-hack PDF link annotation
    • http://zercalo.org/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-fan-page-giveaway_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4944 24716 bytes
SHA-256: 2a7f4a6f26addff1c49321f69abb9c837d7e08af623a81caada6d3151bfbca9b
font_01_sfnt_off0000820a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 19628 bytes
SHA-256: e1160b8fb839ccf8bf55b7f2c732b1cd7a80152dacb66d2a72388c43f504c280

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