Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf7bf4b206b97f7…

MALICIOUS

PDF

51.5 KB Created: 2021-06-09 16:01:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e0a37a8d13a6d4300a38712cfcfd0175 SHA-1: 3b657edab2fe6efbdbe7a6b9871b19f7f1e1f6cd SHA-256: bbf7bf4b206b97f7e9f7832f70f1c33a98845161d8696e1239a3c235a3f92d9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks'. The primary redirector URL identified is https://netcdn.tw/app/431946152/robux-hack-pastebin-explication-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirection workflow, likely intended to deliver a secondary payload or phish for credentials. The presence of a 'download button' lure further supports a deceptive user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9327

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.tw/app/431946152/robux-hack-pastebin-explication-game-hack In PDF document text
    • https://www.manmed.info:443/images/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/pokemon-go-free-wallhack_GM1094591345.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-tiktok-likes-and-fans_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-cheat_GM406889139.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_004_off000053c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C4 30108 bytes
SHA-256: 40560c7b7b1b88c38fdee917ee9624f9e55d33b0bb5ef9cb3e8dc1bdd820c969
font_01_sfnt_off000097f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA50B 18876 bytes
SHA-256: 9c20d93669c367c85569baf05b2274a22345c08f3a0bada45904651e3524c69a

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