Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc2436ac97c8613…

MALICIOUS

PDF

33.9 KB Created: 2021-07-08 15:12:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 95d7db37aa7895cb3ccd5b3500194031 SHA-1: 0e0894b8dc253676190c476f24cee31288656c5c SHA-256: 6dc2436ac97c8613cf6970eac1c8f6ecffaad814364b4149653f1f6ee69e9bb4
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a launch action that redirects to a known malicious URL, disguised as a game hack. This indicates an attempt to lure the user to a site that likely hosts further malicious content or exploits. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • 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/479516143/minecraft-hacks-pc-game-hack In PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/roblox-robux-hack-free-generator_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/roblox-big-paintball-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/i-got-free-robux-from-this_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/roblox-jailbreak-unlimited-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-dope-charecters-roblox_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/google-moon-active_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/launch-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/minecraft-education-free_GM479516143.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_off0000318f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318F 22208 bytes
SHA-256: 81e885e8c507d758d37130391b1e7076770e0bc39f63c2a6b20b753f2fcd53eb
font_01_sfnt_off0000626b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 18180 bytes
SHA-256: 07b76f9baed0128e51c97dec540ec85ee324852e40b3966ddcd0b7b03af6c7e6

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