Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f260e1f6970250…

MALICIOUS

PDF

44.4 KB Created: 2021-06-09 10:56:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b42c2d1212fd1702a1647bc453a15ef4 SHA-1: 2c6560cf3d94f6c820fae875365e96f7008d2672 SHA-256: 98f260e1f69702507017f2b9ab2bd3c957e093e711d752c684981d75606ea091
82 Risk Score

Malware Insights

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

The document impersonates Facebook to lure users with the promise of free Roblox toy codes, directing them to a malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a strong likelihood of credential phishing or a payload download. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-toy-codes-roblox-2021-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/free-toy-codes-roblox-2021-game-hack PDF link annotation
    • http://aviaprofsoyuz.info/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/cheat-engine-cheat-table-for-roblox-2021-windows-7_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/wurst-112_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/como-hackear-cuenta-de-roblox-facil_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000502a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x502A 24716 bytes
SHA-256: e122f5b0e07437bc1557e653b514179e8aaa64188662116689f60f3c82dea82b
font_01_sfnt_off00008960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8960 18704 bytes
SHA-256: 7eab652dee4daab00175e094906b08786cd75541f00fcdae7eb9ebf9c3b7c894

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