Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2a01354f04b852…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 12:21:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d1d655668c18e4a674141f5eaa5731c8 SHA-1: 977cdaedc789e6315a76879108c6b74fc216ae49 SHA-256: de2a01354f04b852b638b920ea9fa144f407fbd4354efe079f9e95aac4bbea75
160 Risk Score

Malware Insights

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

The PDF document contains multiple links designed to lure users into clicking on what appears to be a 'free Robux generator' or 'game hack'. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.tw/app/431946152/how-to-get-free-robux-without-paying-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-og-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-offline_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/promo-codes-to-get-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_off00003240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3240 22496 bytes
SHA-256: ae851f103e2d37644d5c9d7ff746abdb6b30298947dd4f22ebc1cf24585397fb
font_01_sfnt_off00006442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6442 19800 bytes
SHA-256: 1d61554b41e4a561f8cce96d416cb414ffdc77e661a84b072bd4f12fb61e75a1