Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09955e9358a1e77…

MALICIOUS

PDF

46.8 KB Created: 2021-05-14 03:49:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: de916dd3150b2b46e7fb8c7edf4502c3 SHA-1: e5d3053dc26c10490bb5b35e5dea212835168ff7 SHA-256: d09955e9358a1e77842a5cf750a50809a89957fdd0ad90953e508a15e3ea333a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game currency' or 'hacks' to entice users. It contains multiple links to redirector domains, including one identified as malicious infrastructure, which likely serve to host further lures or download malicious payloads. The document body, though partially obfuscated, contains references to these lures and embedded URLs, supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/406889139/get-free-spins-coin-master-link-game-hack In PDF document text
    • http://homebackpackers.com/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://homebackpackers.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://homebackpackers.com/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://homebackpackers.com/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://homebackpackers.com/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://homebackpackers.com/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://homebackpackers.com/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://homebackpackers.com/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://homebackpackers.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://homebackpackers.com/images/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://homebackpackers.com/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5F 23668 bytes
SHA-256: ccc88e718c18f240ba2238ec3e6046da15f403b02c927e30fcf3dfff33e096c1
font_01_sfnt_off000080d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9561 18056 bytes
SHA-256: ab85056fbf29cd03dcfab7de7beb0343ed26656e2e8858e8ad52cb7aa31a5a92

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