Malicious PDF — malware analysis report

Static analysis result for SHA-256 7249887d0fd89546…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 06:32:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f539a2e51031d15084661405190b0386 SHA-1: 8da24055e9601d62797e0fe2dab95bd98c488162 SHA-256: 7249887d0fd89546306c2291a8667c83c3c5bdb3804de46475fab10f0880fa3d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically pointing to a 'free generator / game hack' lure. The embedded URL, https://netcdn.online/app/431946152/robux-game-game-hack, is identified as a malicious redirector. The document's purpose is to trick users into visiting this malicious URL, likely to download further malware or engage in phishing.

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/robux-game-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-tiktok-editor_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-wizard-life-cheats_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/tiktok-free-names_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/tiktok-free-verified_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-hack-me_GM431946152.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_off00004dec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DEC 26868 bytes
SHA-256: 8af1745a18b8ec1a498833b69f15b02cb74c435590c581dfaebad02be1a7f35b
font_01_sfnt_off00008c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8F 18340 bytes
SHA-256: c3384937c05d12942e5ee2f32f048a43efe3336dc3e7ac7a8d2adf4ff389f548