Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f28501cd8f21d6…

MALICIOUS

PDF

50.6 KB Created: 2021-06-03 05:42:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 91f33652c04cc5fa4057d9915257f46b SHA-1: 85c5c3394455a65ae96b6045acdda7a3e68657b4 SHA-256: e6f28501cd8f21d6264fc651550241717dd9ac0d0dbc8d7d1e1014c62069473d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game items or hacks. The primary malicious link identified is https://netcdn.online/app/406889139/free-spins-from-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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/406889139/free-spins-from-coin-master-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/pokemon-go-accounts-free-list-2021_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005310.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5310 24692 bytes
SHA-256: b46f368cdc552a30b66de51bcd0621e1acf3f842704399001aed207737ddf261
font_01_sfnt_off00008be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE9 4028 bytes
SHA-256: 6a4891da4f8b73c02e22ecd6fa566d6bb4f5f2d5575b30a343f3d3c5e0919267
font_02_sfnt_off0000998c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x998C 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA37C 18148 bytes
SHA-256: a8179ab01d9f651dd6fb5ce3364ead5561884d8b40fe8a62eaf26fde05d0c646

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