Malicious PDF — malware analysis report

Static analysis result for SHA-256 59397f8ea13db808…

MALICIOUS

PDF

45.8 KB Created: 2021-05-11 05:08:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a7925772ca20772ef5f2cf81f91e999c SHA-1: a207d8cd728f66e9385f52d8e50b6c9fc9e33470 SHA-256: 59397f8ea13db80879afc3b93ad43dbcca3bb6276fdbabc14ceb358467ba4553
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a critical heuristic firing for a game hack redirector lure, directing users to a known malicious URL. The document body, though heavily obfuscated, contains references to the same malicious URL. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into downloading further malicious content, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/406889139/coin-master-free-spins-link-download-today-game-hack In PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-facebook_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_003_off00004a51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A51 25248 bytes
SHA-256: 711d9178eb9c83a05e05c17c3764f28853e10ae268763a5b52b8d150d29b0cc9
font_01_sfnt_off00008516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8516 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F01 18816 bytes
SHA-256: 7984ac734f2c2edb41e517847f194607c55f1e409037ad7870af27278dae38db

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