Malicious PDF — malware analysis report

Static analysis result for SHA-256 718dd0169e324686…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 19:26:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8f885938f4ec6657fcea9799a27f67fd SHA-1: 6cc2c5e2ad871e24a81898a23e1853dae9ca1ed0 SHA-256: 718dd0169e324686ff116f170a48d73bccdc89f423a3e928b4b1d252500898b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and generators, directing users to malicious redirector infrastructure. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-blogspot-game-hack. The document also contains multiple embedded links to other PDFs hosted on what appears to be compromised academic infrastructure, suggesting a chain of malicious redirects. The ML classifier strongly flagged this PDF as malicious.

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/406889139/coin-master-blogspot-game-hack In PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/nonsense-diamond-hack-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/discover-now-free-robux_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/robux-cheats-without-human-verification_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-tiktok-followers-real_GM835599320.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-health-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-hack-2021-without-human-verification_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_002_off00003428.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3428 23192 bytes
SHA-256: 32fc968ace7fbab987b099657f59556a8786635521e456d0652562d34854867f
font_01_sfnt_off00006872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6872 18300 bytes
SHA-256: 0a317ed1e516c2c88218383b0b7f7e36ebc6c0d231e83ae0ac0c6c70ae5b4b7d

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