Malicious PDF — malware analysis report

Static analysis result for SHA-256 9726b96b7447ac8c…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 06:45:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 67b3c0afc37ec77cd23afd8ff124d83d SHA-1: 6ae42bf9b5193e8e93370650f90d4f951e9dd84a SHA-256: 9726b96b7447ac8c93fc5cc305d9e14be1ca69776f0a4ffcbe0a7d709e4ee9d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for free game currency and hacks, directing users to a known malicious redirector. The embedded URL http://netcdn.tw/app/406889139/coin-master-free-spins-hack-without-human-verification-game-hack is associated with malicious redirector infrastructure. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful sites.

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.tw/app/406889139/coin-master-free-spins-hack-without-human-verification-game-hack In PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-royale-high-cheats-for-diamonds-2021-december_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-make-a-free-thumbnail-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-sign-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-shionbi-life-max-lvl-hack-robloxdaily_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/comment-savoir-si-quelquun-hack-votre-compte-roblox_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/robux-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/where-is-the-hacking-station-clone-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/err-face-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-robux-for-joining-groups_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021-no-hack_GM431946152.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
stream_002_off00003366.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3366 23120 bytes
SHA-256: 803e2bf30a9bfa7d1b69899a3e7fdb332da3d121210c6d21c844248a3da49505
font_01_sfnt_off000067a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A3 19244 bytes
SHA-256: 30c6eda7860abcbe2539b7325d9fcd8b1a95fd07748c36c511e8089874e2a7d7

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