Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ffe3dc73e7964a…

MALICIOUS

PDF

51.0 KB Created: 2021-06-04 04:01:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e57ec2ae45d191ee171bc01e44b6205a SHA-1: 0836361cf9a28c0bbde761925419f0316b362657 SHA-256: c7ffe3dc73e7964ae9e1fbd4bae368bf25384373ea5da78e21a26c3b28550b84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as 'free generators' and 'game hacks' to lure users. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-hack-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a high likelihood of redirecting users to malicious sites, potentially for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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-robux-hack-2021-game-hack In PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/pokemon-go-free-862_GM1094591345.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/pubg-uc-980_GM1330123889.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/pokemon-go-free-joystick-mod-ios_GM1094591345.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-tiktok-followers-royal-key_GM835599320.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E7D 31028 bytes
SHA-256: ce02817d824d7b16c45506972a30e4133dad36292b64c4f03e314dddb3c2f342
font_01_sfnt_off00009620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9620 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA332 18816 bytes
SHA-256: b2e74e066e927f416452387fe7118a02e4882588ce64a473b0bf6318b488dee0

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