Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc9901f46cdbbea…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 16:43:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b0a79763cd3fff5e8368178b8576616b SHA-1: 0ef89f123b23f12a89a5a8471b31b25321cf2811 SHA-256: 8cc9901f46cdbbea23ab6888266b93fa2773ddef7391d1d9f7d6a22a2f0834a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to a malicious domain, masquerading as a generator for game cheats and currency. The heuristic firings indicate that these links point to known malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the lure suggests a potential for further malicious activity, such as downloading additional payloads or phishing for credentials.

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/406889139/coin-spin-link-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/unlimited-robux-level-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/code-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-acc-hacken_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hotels-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-party-de-roblox-pisode-14_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-sited_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_off00002f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F13 22412 bytes
SHA-256: 340e6120de7b616f38405ea8cddbc3c2b6eeb435be0a98945eeb71fe80b5abab
font_01_sfnt_off000060b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B0 18076 bytes
SHA-256: 28c3bbbb127f0926d8e21afd24f58e7e1c0ea518f1d6266cc8eb2e2b41c2b2be

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