Malicious PDF — malware analysis report

Static analysis result for SHA-256 de23806c2be23172…

MALICIOUS

PDF

41.2 KB Created: 2021-05-16 00:46:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bc7247949d8e847b24b33db6a500de22 SHA-1: 4d5faf29466ca036aea59eebf09bda2cc40e101d SHA-256: de23806c2be23172d8f3d7bdf3e830574310a69ffbacd14916258ad86cb61103
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins' for popular games. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hacks-for-free-spins-game-hack. The document's structure and content strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF's nature points towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-hacks-for-free-spins-game-hack In PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-can-i-get-robux_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
stream_003_off00004a5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5D 23512 bytes
SHA-256: 6faec3ba26abcd88b7f248500701fd4ccd84269645b3d17b87d8dd791f5d477f
font_01_sfnt_off00007f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F75 18056 bytes
SHA-256: 12d79a7ddbb75c7a0854102822057d5441bee2ca4a20c79f8211a3d0b9a1f375

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