Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fec632a00cea1e…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 05:28:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 36ea768b6a5fff587c3c2ed55c4b784c SHA-1: 6d38754559ae2b6e57ed02e59eff0c106b3ae3ff SHA-256: c7fec632a00cea1ec7dc4e542be41679896696e684c8e5212c721eb42d337307
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for 'free generator / game hack'. The embedded URL 'http://netcdn.co/app/431946152/super-roblox-hacks-game-hack' is identified as malicious infrastructure. The document body also contains this URL and other related links, reinforcing the lure. No scripts were extracted, but the overall pattern suggests a phishing attempt to redirect users to potentially malicious content.

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/super-roblox-hacks-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-me-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/again-here-for-free-robux-on-roblox-com-free4mobile24-com_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/funny-hack-scripts-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/100-free-spins-coin-master-2021_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_off00003024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3024 21864 bytes
SHA-256: 7773fdf54449db8d6356a884957a9b3dcc51049251429c7aadaa7bc618eb6c05
font_01_sfnt_off000060a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 18972 bytes
SHA-256: cfb4d9f0a1a4b36aeeb5fda7f71008642785461892a6e9fc072ffd1ef7e03eff

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