Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cda0b1456fb7d9d…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 08:49:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4537d51e86d701708cea080c68314ccb SHA-1: d0ce477bc85164dbceb0e7881300ccdc71aaef98 SHA-256: 5cda0b1456fb7d9d9af3e8f64751ef0ac9fbc7e4aa14b15b2bf8fadf91a176a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and a document body that attempts to lure the user into clicking a link for game hacks or free currency. This link redirects to malicious infrastructure, likely to download further malware or conduct phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-clothes-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-coin-master-apple_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
stream_004_off00005090.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5090 28888 bytes
SHA-256: adda74dade9dfc9576c8c6bc71ddd4382660b7b7e8d79875def95f281021a9e4
font_01_sfnt_off00009120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9120 18360 bytes
SHA-256: a1d18e52fe431c3fa184e800cbb116f4a676a51d8f231eb3c7a40e64f11ea3a2

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