Malicious PDF — malware analysis report

Static analysis result for SHA-256 a184196f30e2be29…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 00:03:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ba13089c5bd658e45c9484c559ee3f27 SHA-1: d99c0d8758d806c05ebe61f8c4f792846647d776 SHA-256: a184196f30e2be2954a1d84dbd35bd62d96f7d02954167a55f1ad7b9eddf5f0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'Coin Master Rare Cards Hack'. The document body and embedded URLs reinforce this lure, pointing to the same malicious domain. This indicates a social engineering attack designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-rare-cards-hack-game-hack In PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-cheat-engibe_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-no-human-verification-pc_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-no-scam-or-password_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-change-your-roblox-username-for-free-no-email_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-roblox-items-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/join-any-roblox-server-hack_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-on-laptop-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/robux-hacks-pc_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-do-you-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/quelquun-hacker-mon-compte-roblox_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_002_off00003092.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3092 22904 bytes
SHA-256: a9362bf164cbf9c9c93b83f8a92d52f5650dcabe90146e9a0b819bd940ed4471
font_01_sfnt_off0000644d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 18180 bytes
SHA-256: a1d2185dee36d53b147e12cd8be4f8bcbae1ec15da72c02b630d04b80fdb421f

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