Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc55fcce9a4f8347…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 05:25:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cbf1619a1fa80a64de4f177afda0d7f6 SHA-1: 2db5a44534964f7f0a982b5b61915f8c89d0a001 SHA-256: bc55fcce9a4f83472d7d25426c38c16e2ac164135de75443adc00ffda5d0dadc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector, which is designed to lure users into downloading potentially harmful software or engaging in scams. The document body and heuristics indicate a focus on 'game hacks' and 'free currency', a common lure for phishing and scam operations. No scripts were extracted from this sample.

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/406889139/coin-master-hack-tool-v1-9-download-free-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheapest-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/real-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-roblox-premium_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_off000053d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D9 24540 bytes
SHA-256: 32064c1c9cf1d70f4ecbcebddc5fa137b20b691dccbbe3521ca6efd42bab1325
font_01_sfnt_off00008c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C24 18864 bytes
SHA-256: f6546c931e30ebe5b0f44735796ae8f725f630439fc19eae70f9e7cc234a2321

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