Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0eaff25c0cb47d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 02:24:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 392e5f77f465785dcbee2d0791491522 SHA-1: f3d4885c8bf5245b1518c07d6a7beb5a0b757274 SHA-256: 8b0eaff25c0cb47dd296d2eaefed23f58f09e1d9e202f511ea8585ca6de0e9fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious content, masquerading as game hacks or generators. The primary lure appears to be a 'game hack' which redirects to the malicious domain netcdn.tw. No scripts were extracted, but the document structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/fbchampion-game-hack In PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-apk-mod-unlimited-robux-free-download_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-aimbot-roblox_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-make-your-roblox-character-look-cool-for-free_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-do-you-get-free-2k-robux_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-hack-any-account-password-roblox_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-hacks-cheatscom_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-get-a-free-dominus-hat-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/pubg-uc-generator-without-human-verification_GM1330123889.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-hacked-remotes_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
font_00_sfnt_off00002f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6B 22268 bytes
SHA-256: 1f163dfff8052786e39adb6e99e202a6966535002d2b874171acf6d37e3a9e23
font_01_sfnt_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 18656 bytes
SHA-256: fb679c9250522cab0344be15c9898f12ed930a7de6dfe2591d59bad5f2ca43f7

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