Malicious PDF — malware analysis report

Static analysis result for SHA-256 261c5596ec23a97c…

MALICIOUS

PDF

40.9 KB Created: 2021-05-14 16:14:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2100fd7c6bf11f8e532d07cfb38c6b9c SHA-1: 52fe9fbac06cd3444b33a69fe4c95fe74d53104f SHA-256: 261c5596ec23a97cb7b054bb47e087242ea0c23353728f880ac7522c87867e23
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically disguised as "game hacks" and "free generators." The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-fast-game-hack. The document body and embedded links suggest a social engineering lure to trick users into visiting these sites, which likely serve as a gateway for further malicious activity, such as malware downloads or phishing.

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/406889139/coin-master-hack-fast-game-hack In PDF document text
    • https://kinderdam.nl/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-place_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-reddit_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_off0000475f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x475F 24712 bytes
SHA-256: 53af34c3e36b0a2ff3fab850412b83ef97cb7d874c50478ad0aedec004355602
font_01_sfnt_off00007ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED8 17880 bytes
SHA-256: 2efdef3fd2f59ea81db594e192353872d83e83ccb870d2af1caf7a2c1a824eb1

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