Malicious PDF — malware analysis report

Static analysis result for SHA-256 391287c9fa2c5b5c…

MALICIOUS

PDF

50.1 KB Created: 2021-05-13 00:06:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cbd79b3df70092e09832a16d62a4dfc0 SHA-1: 201a9d5ea951238ac472e21fe3fea24bccaf18a5 SHA-256: 391287c9fa2c5b5c1ac384e6684b4aba1fd248f2c9db92e62613e31e66f402eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, masquerading as free game hacks and generators. The primary lure URL is https://netcdn.xyz/app/431946152/free-roblox-pin-codes-game-hack, which likely serves as a gateway to further malicious content or exploits. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://netcdn.xyz/app/431946152/free-roblox-pin-codes-game-hack In PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/give-me-robux_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.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_003_off00004ded.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DED 38432 bytes
SHA-256: 9773f4285c5bf7dee37796e7f7e3552bc5d2628fd196d7b73de0fa1e5dbf055b
font_01_sfnt_off0000a220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA220 18396 bytes
SHA-256: f52dc14ee7e448aa0f674abe902bf1c93ecce416da154576fb4a0807dea580f0

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