Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd394fe9c0bec110…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 11:41:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 15cab4131e4e81c144352f50bd1da0fe SHA-1: f1404b42524fbc64ddd84bfbb262e797002e9755 SHA-256: cd394fe9c0bec110d50e56cbdaa8e467bb82cffe8c6966bb618de5cd08e1a4d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The document body, though partially corrupted, also contains similar URLs, reinforcing the social engineering aspect of the attack. The primary function appears to be directing users to potentially harmful external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.online/app/479516143/free-minecraft-account-generator-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/tiktok-free-hosting_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-tiktok-likes-and-views_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/earn-free-spins-for-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A3 24704 bytes
SHA-256: 244e5ce4ab5adec474653c9eb9bd941d50169173d0257fac311ff37c4af03dc3
font_01_sfnt_off00008a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2B 2864 bytes
SHA-256: 6a7dcc230e1ac3abacc5fcc7fbbc2fffae1cb9795209ffa61aedf61d3fd79c9f
font_02_sfnt_off0000940c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940C 17848 bytes
SHA-256: ac3b0f7a72dc6f29c3b7fbd43af928bb412d301226b2a88e16f0d2541e2fb97b

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