Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9f8fc565067f2b…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 08:19:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b6fc9aab1e7a5ac8992fe4fe2a0199a5 SHA-1: ca6ee8982879e2ff4ed59c9aee1e8b664b1002b4 SHA-256: 7e9f8fc565067f2ba25777f69acc803d298a79747f5f32bb9113e8779f674b5c
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to a known malicious redirector, specifically advertising a 'game hack' lure. The document body, though heavily obfuscated, contains references to similar lures and embedded URLs. The presence of a download button lure and password instructions suggests an attempt to obscure a malicious payload, likely delivered via the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/daily-spins-coin-master-game-hack In PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-no-survey-or-verification_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
stream_004_off0000510a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510A 24792 bytes
SHA-256: aa8c1613b92980b7cb0de22d3c072a1ea90391fd5268910aa1b3d5ada2ab1b45
font_01_sfnt_off00008a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3A 18144 bytes
SHA-256: 1262f4d4cd034a4c9562a277dbba73095a6416475eb754b173a4e193cc6b3510

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