Malicious PDF — malware analysis report

Static analysis result for SHA-256 1980da3abf988a7a…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 23:13:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a0318ff4f39ab77af07da8061ad69e65 SHA-1: 0c2de171063a809cbc5d9f365ad8cc9d5275f842 SHA-256: 1980da3abf988a7a6670ad5df7636a0dac3abc7012b807ae7846dafa1e0847c5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector, disguised as a generator for free items or game hacks. The document body and heuristics indicate a lure to trick users into clicking these links. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/835599320/which-tiktok-free-movies-game-hack In PDF document text
    • http://library-fkip.uho.ac.id/repository/download-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-free-money-generator_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-websites-no-human-verification_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_004_off000050fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50FD 24528 bytes
SHA-256: 5d412cec7f421ccf55603d45d13a2efbb9cafc2c85a2dd8a1cbdbc5cff3005f5
font_01_sfnt_off000089c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C7 18128 bytes
SHA-256: 350c20f6a16841443323762113a187b382ae4c59d2dc1c6d0b792c7e931a6a4a

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