Malicious PDF — malware analysis report

Static analysis result for SHA-256 f182928b0c1bc7c1…

MALICIOUS

PDF

46.4 KB Created: 2021-05-16 00:10:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9bc78e40086acb31958be0e1c5cd0bdb SHA-1: c93378a3183fa0c5fb1e985cc3c6e0098013d283 SHA-256: f182928b0c1bc7c1cf361fd76e3368fef24a64871b61d01bb555c3c1d967a534
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and free downloads. The primary lure URL is https://netcdn.xyz/app/479516143/how-to-download-minecraft-windows-10-edition-for-free-game-hack. The presence of embedded URLs and a malicious redirector link strongly suggests a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/479516143/how-to-download-minecraft-windows-10-edition-for-free-game-hack In PDF document text
    • https://www.croydex.com/uploads/files/files/roblox-ban_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-free-gold_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_003_off00004d84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D84 25168 bytes
SHA-256: 95c3a16e5fe561f1393a4def0f8db816bd8b14b39d4f9aa127765f89d74742c3
font_01_sfnt_off0000869e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869E 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off00009149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9149 18764 bytes
SHA-256: 21f431781c44949058772af5dafb642530c243ab7b82586e83b465fe58a13039

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