Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b56631230106e9d…

MALICIOUS

PDF

49.6 KB Created: 2021-06-03 13:46:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5d193e767769e8d17661aed5bed90c02 SHA-1: 95d3b9e48a3b3536de77227daa1920e572163f8c SHA-256: 3b56631230106e9d632008152d5043c7fc75969124ae2e2ae4cfda1fb7c38506
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'free generator / game hack' and links to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded URL is designed to lead users to potentially harmful content, likely a scam or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/what-games-give-you-robux-game-hack In PDF document text
    • https://library.um-sorong.ac.id/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/pubg-uc-iraq_GM1330123889.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/robuxmatchcom-free-robux_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
stream_004_off00005168.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5168 30196 bytes
SHA-256: c85b378f2cc815cce7c05d38269efa2d8b802748ee7214cc5ad33bd3f7ec89a6
font_01_sfnt_off000092bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92BF 2820 bytes
SHA-256: 984d79cc00e4aaa21be427f23b56147105e8f12e1ad5c504d904a5b27c613147
font_02_sfnt_off00009c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C58 19204 bytes
SHA-256: a8a8069ad255714c63732906054468a38650da8d5abe6d30a797395b54525095

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