Malicious PDF — malware analysis report

Static analysis result for SHA-256 928024e2061f7d1e…

MALICIOUS

PDF

34.7 KB Created: 2021-07-02 01:09:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a661ccad497915a3222281887d734265 SHA-1: dedc8e1a1fd440e2569d643e8cb2a57808c40ece SHA-256: 928024e2061f7d1e716c48570e428d16ed7f92c9e47fb8131e7fed7715e1210a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/how-to-get-free-robux-no-human-verification-on-phone-game-hack. The document body and heuristics indicate a lure for free game hacks or currency, designed to trick users into visiting these malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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-to-get-free-robux-no-human-verification-on-phone-game-hack In PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-hack-coins-in-reason-to-die-roblox_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/lucifer-roblox-hack_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/hack-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/best-roblox-games-with-free-beat-box_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-jailbreak-speed-hack-2021_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000303a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303A 21884 bytes
SHA-256: 576c7c35f434841fbe114e286d287c9f409947c18c48359bff04c0d56be40681
font_01_sfnt_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 19816 bytes
SHA-256: 262570079dba7dc958ce8d1d2de4f781caf2f638e338d2f135a680f845073938

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