Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d81610dd679587b…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 09:22:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9647dfcc5a4984d29ef355a4733fa673 SHA-1: 6b748722457dcb72d0611f6c185046308856e88d SHA-256: 7d81610dd679587bc32b832a8bd9073742361a24ce908d4dd17fbe83b39c926b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game-related cheats and currency, such as 'free-roblox-codes-2021-game-hack'. These links are identified as malicious redirectors, indicating a likely phishing or malware distribution attempt. The document body and embedded links strongly suggest a lure designed to entice users into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/free-roblox-codes-2021-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/pokemon-go-free-spoofer_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/rbx-earn_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-spin-sites-for-coin-master_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_off0000532a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532A 26028 bytes
SHA-256: 8ffdea3e2f08abb1e22206b1c9f856b0b2444a27288d2973364aac5883736658
font_01_sfnt_off00008f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3E 18524 bytes
SHA-256: 2cb7cffe6898b24bffb42f458692356b56cf8186bc9d806687ffddb45d527cfe

Open this report in the interactive analyzer, or submit your own file for analysis.