Malicious PDF — malware analysis report

Static analysis result for SHA-256 628fff8ad68c22e1…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 02:25:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f46f32b33f52f5fdafdb2b58e568e9c7 SHA-1: 0854dcbd4b15b7196614d4d6225b811896e94a28 SHA-256: 628fff8ad68c22e166b01bc78b86d7112c4c1797ee30fac0c4f7ac650ee82fe3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary URL, http://netcdn.tw/app/431946152/free-robux-no-anti-bot-verification-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites that may host further malware or phishing campaigns.

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/431946152/free-robux-no-anti-bot-verification-game-hack In PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/knife-server-roblox-hack_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-on-android_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-games-on-mobile_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-ban-people-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-a-free-package-on-roblox_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/roblox-wikia-free-robux_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-roblox-shirt-template-download_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-hack-a-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-builders-club_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/roblox-free-download-on-game_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/como-tener-robux-gratis-2021-sin-hack_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy_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_off0000327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327D 22360 bytes
SHA-256: e84d3a6a02f8cafc32e145577be9fb743edd8095c06cf48bbd5c339b6c48348f
font_01_sfnt_off0000644c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 19072 bytes
SHA-256: 44398671923ff2d7fd58b4a2dab61ea7a8ec8f67097837434ce2698c2fa81bb9

Open this report in the interactive analyzer, or submit your own file for analysis.