Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffc0a276d111c8a…

MALICIOUS

PDF

33.8 KB Created: 2021-06-19 06:30:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5e4c5166886353f817f3ad15ec114376 SHA-1: dda305139a08f37abc5aa59663bc11d26ceccbf9 SHA-256: dffc0a276d111c8a40a0230b61b145225fcef07f15055b76eb893c0ad7b5e0d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary link, http://netcdn.co/app/431946152/free-robux-codes-not-used-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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/free-robux-codes-not-used-game-hack In PDF document text
    • http://amcoeur.org/images/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://amcoeur.org/images/create-your-own-roblox-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://amcoeur.org/images/roblox-cframe-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/roblox-redline-cheat_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/commands-for-free-admin-for-roblox-list_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://amcoeur.org/images/free-pin-to-redeem-roblox_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/how-to-hack-work-at-a-pizza-place-roblox-2021_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://amcoeur.org/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://amcoeur.org/images/roblox-how-to-change-your-name-for-free-2021_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://amcoeur.org/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://amcoeur.org/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://amcoeur.org/images/free-robux-roblox-11-14-16_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://amcoeur.org/images/free-gold-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://amcoeur.org/images/coin-master-daily-free-spins-link-today_GM406889139.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
font_00_sfnt_off00002d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D83 22208 bytes
SHA-256: ef3c2f1e66d32ae9fc2a14422ce34c73b7d7dd5f89b7046fa957d5071dc340f9
font_01_sfnt_off00005ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE5 18996 bytes
SHA-256: f2ef840589acbf5544ca5c360f8f850f834bdb07628ffcf9725997a7326c7744

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