Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc37cb97c0018d6e…

MALICIOUS

PDF

33.9 KB Created: 2021-06-27 20:36:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fc6cd30a6d3a756b65aaf50ac8378a9b SHA-1: 6bbe09eaf09968fd130eda7388f854d790ff27bc SHA-256: cc37cb97c0018d6e2d50af95fd284caf71d2cd29c179023bd36862ffd5317713
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that lead to a known malicious redirector, disguised as a 'free generator / game hack'. The ML classifier strongly indicated maliciousness. The document body and heuristics suggest a lure for free in-game currency or hacks, which is a common social engineering tactic to trick users into visiting malicious sites.

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.co/app/431946152/l-free-robux-game-hack In PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-free-robux-by-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-jailbreak-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hacked-case-clicker-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/tiktok-free-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-piano-roblox-got-talent_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-lining-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/download-roblox-music-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-mass-hacked_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/cheat-engine-cheat-tables-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-mod-apk-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hacks-kostenlos_GM431946152.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_off00002e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E55 22456 bytes
SHA-256: 91341ae90ab66a65c6f53eb9e28306d6a7d7aba92a6b984f8192343100f8d1e0
font_01_sfnt_off00006067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 18716 bytes
SHA-256: 5d7d056ffb865999c2b42fd16dbb618d6c63f33d45d7cd1cd18a4f4db2fc04a5

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