Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd8da296b4eb8c5…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 14:11:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 09b31a0cdbafa7e0ebcdab36f445daa7 SHA-1: ea26f86f7db9e1d3e1dfd6d6e0262e510da4809b SHA-256: ddd8da296b4eb8c5096cdde30a62278ba7175cf193afd786cb06e17612a2bdf2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs and a prominent external URI pointing to a file hosted on 'netcdn.co', likely intended to deliver a malicious payload. The document body and extracted URLs suggest a lure related to game cheats and free items for popular games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-coin-roblox-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-hack-fe-games-roblox-v3r_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3143 21880 bytes
SHA-256: 53caaef6876d5b3bfc4cf0aa0ef0daba13fccc4d5c1606339ce4a83411f7651e
font_01_sfnt_off000061c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C6 18776 bytes
SHA-256: dd15039a4864326ca3d76d17710f53a3213ab9f56bc2ea6856410aff4a485d9a

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