Malicious PDF — malware analysis report

Static analysis result for SHA-256 960183acfa1b482d…

MALICIOUS

PDF

43.0 KB Created: 2021-05-14 11:00:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6bcea5a01ac068aeacacafe43b0884d4 SHA-1: 135971cdc87813a749bb5df2e3ee8d47ce6d1306 SHA-256: 960183acfa1b482d8a07c53333cf9b60fed5cb1a223d05510cde8a286ab1e9b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency (Robux) to entice users into clicking embedded links. The primary link, https://netcdn.xyz/app/431946152/free-robux-no-verification-2021-ios-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead users to potentially malicious websites, likely for further exploitation or phishing. The document's content and linked URLs strongly indicate a social engineering tactic to compromise users.

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/431946152/free-robux-no-verification-2021-ios-game-hack In PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-images_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-by-playing-games_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_off00004a73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A73 24732 bytes
SHA-256: 72c6b8dfc60a602edc1dd7006abf28e293ca6a4bc1e9f32383d84fb266de4c66
font_01_sfnt_off000083a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A8 19004 bytes
SHA-256: 57c461ba4099b7c3a729e07f809cac2bd0540fe115d61d2f21d5ca70446f19e8

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