Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15943f22c3d7f5b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 11:17:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 337c3bbdbffa05fc6b2eddec611d8d4d SHA-1: 860dd2b3858fca70c82a8c40706d52a35179bb49 SHA-256: b15943f22c3d7f5b3f137c9974842a0063c7a531d2ea311855250a847f5c0e34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users with lures for game hacks and free generators. The embedded URL, http://netcdn.co/app/431946152/roblox-free-cam-script-game-hack, is the primary indicator of this malicious redirection. The document body, though partially garbled, reinforces the theme of 'Roblox Free Cam Script' and includes the malicious URL, suggesting a phishing or scam 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.co/app/431946152/roblox-free-cam-script-game-hack In PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/get-free-robux-on-robloxcom_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/mm2-roblox-free-seer-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/robux-gg-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-free-builders-club-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-free-black-pants_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-roblox-gift-card-uk_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/como-convertirse-en-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/www-free-robux-hacker_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-card-giver-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/100-robux_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_off0000303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303D 22676 bytes
SHA-256: 0e5f76e1b6a840852271bdaf24092dd6d03ee7e7e1c2081185daa8ff924473d2
font_01_sfnt_off000062d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D5 19312 bytes
SHA-256: ea1da4248ec09ba5dd6a4501ec922e3b98c987167d4344708b922c2297eb66f6

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