Malicious PDF — malware analysis report

Static analysis result for SHA-256 22666c999dc0b1a3…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 10:14:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6bccc170e82cd67f7d5bcbd406d46549 SHA-1: f4019d94c3ea3b9c2618548dee3a2280ef40d038 SHA-256: 22666c999dc0b1a349ed9b7553407c63a5bdcb39dd8b508f5452274d831db299
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 game hacks and free currency. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-hack-client-game-hack, which is associated with a 'free generator / game hack'. The document body, though partially obfuscated, contains references to these lures and embedded URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/roblox-hack-client-game-hack In PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pubg-uc-price-in-bd_GM1330123889.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-thumbnails_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_off00005010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5010 28652 bytes
SHA-256: 5dc4e6b9fae05cd6e124a3a4f154ef92385e57a10eebc97d6bb647e3c9ad8626
font_01_sfnt_off000091bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BF 18408 bytes
SHA-256: 550f62bb1f49814ef42b1b735b63b4edf215944f9d7482118736a3d91d594bfc