Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a8faf8644756ad…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 13:26:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 25fc351adc8a4d0fe3fa159fb8297e96 SHA-1: 10d2f3e968095c85a4ab88e90afa9ac75391c28d SHA-256: e3a8faf8644756adda4e2d0e069071fcce68e0c712ea6071c8ca4d2e54a619e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' and 'game hack' lures. The document body and heuristics indicate a clear intent to trick users into visiting these sites, likely for credential harvesting or malware delivery. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of a phishing or scam campaign.

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.co/app/431946152/free-robux-generator-2021-android-game-hack In PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/pubg-uc-kuwait_GM1330123889.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/flying-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-military-costume-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/pubg-uc-400_GM1330123889.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-hack-mago-by-out-wit_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-murder-mystery-2-hack-script_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-hack-someones-roblox-account-2021_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_off00002fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEA 22144 bytes
SHA-256: b38651488e2e7956bdd200732f966901569496a499f1d66a9f1e3b7882e70a4f
font_01_sfnt_off00006105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 19516 bytes
SHA-256: 10da643cf9dde604cf155259ffb077da39c2cfd80da055a96b4da44aa6a98e01

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