Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebc95a053e602f5…

MALICIOUS

PDF

46.0 KB Created: 2021-06-07 08:13:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1bf3f8f196d779aec2665f3e1abb79fc SHA-1: c855b24164312817c483fe66dd6451d1ecb855a1 SHA-256: 7ebc95a053e602f5d4c549c81a34f7ca0fc1cf89d08b8521d53ee5f4bc9c1345
200 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a link to a malicious redirector, designed to trick users into clicking through to potentially malicious content. The document body and embedded URLs suggest a lure related to game cheats or free in-game currency. While no scripts were explicitly extracted, the PDF structure and the presence of redirector links indicate a high likelihood of exploiting user interaction to lead them to a malicious site, potentially for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/ben-10-universal-showdown-cheats-codes-roblox-game-hack In PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coinmaster_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/master-free-spin-and-coin-link_GM406889139.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_off000052bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52BB 25988 bytes
SHA-256: 538533f0110963048b554407f367f8bdc6750b271b9bd41368a524ce33a8b3e5
font_01_sfnt_off00008e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E19 19320 bytes
SHA-256: f4354523288c20d75b2b48b4e15b26f6523a993eade6163df8958c4e77187b71

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