Malicious PDF — malware analysis report

Static analysis result for SHA-256 232b3077e37c92d5…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 22:31:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: adc3e83a0af669599cbbdcce83acdf9e SHA-1: ed937b0f6ca9e1b4c3f636a1b30d6474da2fe0c0 SHA-256: 232b3077e37c92d5c3a3bf9c3621d96dfe2f2781f358a641af28cdccce0e89ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that lead to known malicious redirectors, specifically advertising 'game hacks' and 'free coins'. The primary link directs to 'netcdn.online', which is flagged as malicious infrastructure. The document body and heuristics suggest a lure to download potentially unwanted or malicious software, masquerading as game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/coin-master-free-coins-link-game-hack In PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-hack-roblox-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-website-safe_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-not-a-scam_GM431946152.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_off00005315.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5315 25696 bytes
SHA-256: 3a0fb3c2f5dd8111ad446632f7d6d3578e1d9c8f78de4a275cf9bd2575e4d336
font_01_sfnt_off00008d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4F 2820 bytes
SHA-256: e5f6ec650849eefe6bc6a1649c2875ce35328d23e4196945bba66cc43e5a49d4
font_02_sfnt_off000096ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EE 17880 bytes
SHA-256: 5ce88b684446e36e89a0643934549b22fce1d776877bbe9d9a558feafde7429d

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