Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b222c63a4c30327…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 02:28:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 971a86205cf21c7c6fabfa006b84e3c4 SHA-1: dc0680dbde20c0078ff304caeeec9c7bb58b678f SHA-256: 2b222c63a4c30327d4c41c2c0581c5466c10beb27c0978f9b5481be467c08ac5
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 0.9769

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 https://netcdn.tw/app/431946152/hide-and-seek-extreme-roblox-hack-pastebin-game-hack PDF link annotation
    • http://perpus.unbi.ac.id/slims7_cendana//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/pokemon-go-free-gift_GM1094591345.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/100-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-in-edit-game-hack-gui_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-time-hack_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CC 25176 bytes
SHA-256: 992399769803001c9240616365da33e0dac3d82625f1d1a5fd2d1e0114654958
font_01_sfnt_off00008c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C39 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off000095fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95FA 18992 bytes
SHA-256: 9da63904738275ff0b324aa1b8c3c6e47e3608383e7820c2d323af3dbf6e51a7

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