Malicious PDF — malware analysis report

Static analysis result for SHA-256 883d43a075c70880…

MALICIOUS

PDF

45.1 KB Created: 2021-05-11 22:34:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4d79bc6c357850ffc9bd9afafb364987 SHA-1: ac903758a434bea105e51e8b27450f3de1a11509 SHA-256: 883d43a075c70880faf5cdcf5e92c6dd2f91c86d2739c70d14421eeb6940836f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack generators, indicating a lure-based attack. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/minecraft-windows-10-hacks-game-hack In PDF document text
    • http://scuttworksdesigns.us/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://scuttworksdesigns.us/images/free-robux-gift-card-codes-2021_GM431946152.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_off000048c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C5 25320 bytes
SHA-256: d6f2ab1c4a2ccaacaa85dc75cb19f2d6bdc697fe5dc5ca70c08088d55db21b5f
font_01_sfnt_off0000821e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821E 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2E 18696 bytes
SHA-256: 14f86b407040f424958936cb2b2b49b26067a8980bd50a77917f0563cc1bff87

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