Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b309ad3b65fac09…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 19:20:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: de6f627e74ac2e17bc4bc4f2d76aa8c9 SHA-1: fb11ec6092cc02d756d48474a9775776fdb9341e SHA-256: 1b309ad3b65fac0934e2d9f962a395d4d3e2796a760036d934e72d39bf312076
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a call-to-action button further supports a malicious intent to lure users to potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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.tw/app/479516143/wurst-client-game-hack In PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/hacks-for-da-hood-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-robux-no-surveys-or-offers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-robux-bot_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/hack-rpg-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/roblox-hack-download-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/how-to-download-roblox-strucid-hacks-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/free-robux-codes-not-used_GM431946152.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_off00002f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5B 21840 bytes
SHA-256: 0efc795ec946df87c9a143abb46def9a9e65d1e29f76240186834b050773e262
font_01_sfnt_off00005f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 18268 bytes
SHA-256: 2412ed9a3ceb2eea26d296ef98a0637bbee5e1d0f7918c2b5d1477ee9abc40e8

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