Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a467aa99cad067…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 06:45:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d2561a489953416e022072758f716835 SHA-1: 084b1b358c1546eae2d3723120ba7c4b4b72a545 SHA-256: d5a467aa99cad067de715ab236cedc8f4deb4bc4328f7e4c864a4683fba20adc
82 Risk Score

Malware Insights

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

The PDF document impersonates Microsoft and contains a call-to-action link that redirects to a suspicious domain. The link's content suggests a lure for free game-related items, which is a common tactic for credential phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/is-there-a-free-coding-platform-for-roblox-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.tw/app/431946152/is-there-a-free-coding-platform-for-roblox-game-hack PDF link annotation
    • http://schmittmusic.de/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://schmittmusic.de/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://schmittmusic.de/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://schmittmusic.de/images/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://schmittmusic.de/images/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/free-robux-no-survey-no-download-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/haktuts-coin-master-free-spin-today_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EA 24636 bytes
SHA-256: 418a1e2c318f9bb1c7eef10665486ccaec9493af856e0af894d68f7bcad7833e
font_01_sfnt_off00008b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B41 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000094f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F0 19440 bytes
SHA-256: 5d788247fe77a59161a4272e010212de9b3f7ec6d10f3f81fe0ed96013b73cd3

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