Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ab0808abb07c65…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 10:46:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 34df35d6a97127429917f084d6768bea SHA-1: 6bb65ba8191adefe0765587487d8643f31bc2330 SHA-256: 20ab0808abb07c65fdde57afe4a635eb9b3ede4fc818e411197dee7adecb6043
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free generators, impersonating Microsoft to encourage clicks. The embedded link redirects to known malicious infrastructure, indicating a phishing or credential harvesting attempt. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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: http://netcdn.co/app/431946152/hacked-roblox-accounts-list-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
  • 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 http://netcdn.co/app/431946152/hacked-roblox-accounts-list-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/robux-game_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-codes-generator-downlaown-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/project-alpha-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-games-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-item-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-download-ps3_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-legend-of-the-bone-sword-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-moderators_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_off00002ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF0 21796 bytes
SHA-256: 153d2ef48f6a93f235eaa113760d59c68c5fb472f2b97af327b7c15cb9f0a810
font_01_sfnt_off00005edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 19196 bytes
SHA-256: 381610bbab0b7b31e380a7a4918c50b3e30c1fbe9436aeae15edec1864da4a24

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