Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30a4a7343454acd…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 14:19:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6458a293bf684c04cdc62deb462f7706 SHA-1: 64a149bb15c04fcdda751d13683ef21e5556dd71 SHA-256: d30a4a7343454acd375649f8c7d4c757e17214db4217d5fdb323d132757806dc
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/rbx-roblox-robux-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-xp-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/comment-avoir-des-robux-gratuit-sans-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-phantom-forces-hacks_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-install-lego-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robeats-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-build-a-boat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-page_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/774-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/synapes-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-high-school-money-cheat_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-can-i-get-free-spins-on-coin-master_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
font_00_sfnt_off00002f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3B 21220 bytes
SHA-256: 64ddc691492cfa0ac6e74be8b64fb86ceb7201815ffa988348f8c03f7288b5a4
font_01_sfnt_off00005d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D99 18628 bytes
SHA-256: fc8477d287bc75180d007451741119beea25bfc07268422a1f9cf6fe335c9d46

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