Malicious PDF — malware analysis report

Static analysis result for SHA-256 314d628bb9c6524e…

MALICIOUS

PDF

37.7 KB Created: 2021-07-04 11:52:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b5507d3b5e42fafa835de51ad5971e45 SHA-1: cc257ff724ff349eb2c7393b96bada38b2b6765e SHA-256: 314d628bb9c6524ecdf2ae77f12bfce9a84c7732aee87546cdff0298a35c5fd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/free-coins-and-spins-coin-master-2021-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-apocalypse-rising-hack-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-getting-hacked-full-video-of-it-happening_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/buzz-hacked-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cheat-codes-for-roblox-pumpkin-carving-simulator_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-codes-for-phone_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-printable_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rc7-roblox-download-free-mac_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/znac-free-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-roblox-lumber-tycoon-2-axe_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/fre-robuxe_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
font_00_sfnt_off000031ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EC 22812 bytes
SHA-256: 432c6aaa34dc55171f4aa29c47d89f781bea3233ea8e2faabeada1cb6aee3909
font_01_sfnt_off000064eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EB 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 18752 bytes
SHA-256: 2808497b37fc1d4f34a1fffc3dd5e81983cd3403e98677a9ba5497e95ebc42c8

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