Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa74a78e9cd8b14…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 08:27:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 60289261495aad31268607933be25f49 SHA-1: c5f23f5e4c7f825d8f8db3bcf12ff6c98e7b54a2 SHA-256: dfa74a78e9cd8b14ce3d7eaba6e2f4a298fb76ccd01d40958dc6dc76633a9d23
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a website offering a 'game hack', identified as a lure for malicious activity. The ML classifier also flagged the PDF with high confidence. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/479516143/minecraft-free-play-now-game-hack In PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/pubg-uc-via-login_GM1330123889.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/will-tiktok-free-view-bot_GM835599320.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/jailbreak-roblox-hack_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_004_off0000535c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x535C 25924 bytes
SHA-256: 038b732097c22153758bc7eb92303600b92425ae18ef1d12b6b0f8ddb047ee86
font_01_sfnt_off00008ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 18284 bytes
SHA-256: 8fb035a18fc16afc6f4ff9a5e26a6abbde664002078e0241365ac52d9e0fb39c

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