Malicious PDF — malware analysis report

Static analysis result for SHA-256 3975b9fff7e84f66…

MALICIOUS

PDF

34.0 KB Created: 2021-07-01 20:05:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f5beca0b6cb72d3d66f1f36266406a9f SHA-1: c6a72d2918a6b84e1d69aa8c30c0da22dd150b98 SHA-256: 3975b9fff7e84f669141b330d0ce4af4d36ebc861a571b876b87cd8197b836b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/how-can-i-get-free-robux-game-hack, which is designed to trick users into downloading further malicious content. The document body and embedded URLs strongly suggest a social engineering tactic to deliver potentially unwanted or malicious applications.

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/how-can-i-get-free-robux-game-hack In PDF document text
    • http://tileworld.com.au/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/pokemon-go-free-to-play_GM1094591345.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-map_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-get-free-robux-hacks-2021_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
font_00_sfnt_off00002e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E30 22316 bytes
SHA-256: 30825d0f2a8498f44398014de1d5f521c9f5b89d4a13fdb0e5c3d6320f90de86
font_01_sfnt_off00005fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD2 18984 bytes
SHA-256: 88d69eb3e5aacbb9415b7e9d5cab519469ee3fdfdf18acc61836835876a3bab2

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