Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8970c44855bff9e…

MALICIOUS

PDF

43.8 KB Created: 2021-06-04 01:24:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 06c0672c7c20238765392079a76ada3f SHA-1: 593dc744ef77c267aaaf2faf0874eab2426fe167 SHA-256: c8970c44855bff9e0f52c2259aee4b161bd4489752f92a71d045213365782098
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as a "Roblox Hack Site" and other game-related lures. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary function appears to be redirecting users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-hack-site-game-hack In PDF document text
    • http://lib.akpnbahtera.ac.id/repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_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
font_00_sfnt_off0000526f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x526F 23740 bytes
SHA-256: d35547e6bf99276f4e4c1884a87198f9fb327714972367053cbd052d7b88ba35
font_01_sfnt_off00008813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8813 18408 bytes
SHA-256: baa68e8b80fe17984eb0f5893287011db8c451c65a8bba41303beeb2aadfa952

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