Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a4b5803faf37dc…

MALICIOUS

PDF

45.8 KB Created: 2021-06-04 04:54:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b699e193e796fd59c04c00e53124bdd2 SHA-1: d7f806cc8a8e317cf6182264ef636422b102b309 SHA-256: e1a4b5803faf37dc3f3631a540ac112061a908b2efd9c1854ee0f825ee8f4ef5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The heuristic firings indicate that the PDF is designed as a lure to redirect users to potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to lead the user to a malicious download or exploit 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/431946152/roblox-bloxburg-hack-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/tiktok-free-online-unblocked_GM835599320.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/pubg-uc-carding-method-2021_GM1330123889.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 28332 bytes
SHA-256: 1fe59140240ce324a98e45c010f97760825132c56a2a70768d59026c65adde1b
font_01_sfnt_off00008f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 18612 bytes
SHA-256: 37e90c8061a4a16b527b0ce3c54248cb15785eeeb08769655426872893a017f2

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