Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abf81cde65bdde4…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 04:05:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: db6479c1685835da2009ea4ee018126b SHA-1: 142e0bfc9aed276e6de0d38007671d4bec2342c7 SHA-256: 7abf81cde65bdde4a47babae67ccaf1e7a218b878ccb3b15302be60d1405450b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file 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 0.9865

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.online/app/479516143/minecraft-free-version-pc-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-app-hack_GM406889139.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
stream_004_off00005134.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5134 26208 bytes
SHA-256: 233473b12d0947e3a2a13ebf98dd9122d1342acb7490657b57f01b0765e13bf1
font_01_sfnt_off00008cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC9 18000 bytes
SHA-256: 596bbbc5b74f8f8d5f8cfb941eefd0324f2b497cb668fe7d549b39bc00e1e0cd

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