Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fa302e9c4f2318…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 12:08:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 145d4941d2b3fcc33a5391b6f4da6d61 SHA-1: 6a4390677e598905793cb2d4ba276c2d4c5a28dd SHA-256: 70fa302e9c4f2318f9a95c2cb8c86c60b32fb76d445c72c655023efb1bd26cae
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA and a 'game hack' lure to deceive users into interacting with malicious links. The primary link directs to a known malicious redirector, which likely serves as a gateway to further malicious content or scams. The document's content and embedded URLs strongly suggest a phishing or scamming attempt, aiming to exploit user interest in free in-game currency or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/roblox-promo-codes-for-free-robux-game-hack In PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/rbxfree-com-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
stream_003_off0000489b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489B 26724 bytes
SHA-256: a7d7898d20d8543b73046c53582a139333e07c44be3f7add6894d32d13d4b88c
font_01_sfnt_off000084c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C9 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f

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