Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ee7141186261c3…

MALICIOUS

PDF

48.1 KB Created: 2021-05-15 09:06:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 28c6bf999f6fa0e50de6f1ac98f13ef5 SHA-1: 55dd2ec5084782a4e9f86a571ed8b2fc9d863e46 SHA-256: c4ee7141186261c39b652f321c85c7bf7aa637b555566ad599d00a109bb11ad3
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristics indicating brand impersonation (Amazon, Roblox) and a lure for free virtual currency, suggesting a phishing or malware distribution attempt. The primary URL, https://netcdn.xyz/app/431946152/roblox40.com-robux-game-hack, is associated with a Roblox hack lure. The document body, though partially garbled, contains references to Roblox and game hacks, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/roblox40.com-robux-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/roblox40.com-robux-game-hack PDF link annotation
    • http://apartstmichel.com.ar/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://apartstmichel.com.ar/images/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ca4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA4 27180 bytes
SHA-256: 67939ec0a3cb0e254f07656c27ccad18a5e187c8cfcac600d066fcd003f5e629
font_01_sfnt_off00008a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A60 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_02_sfnt_off000098ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98EC 18484 bytes
SHA-256: 9918e4e201cf4584f779f98ae8fff3df607e64c5e2e67c0d23409290931a1188

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