Malicious PDF — malware analysis report

Static analysis result for SHA-256 3984b32ae1ed764e…

MALICIOUS

PDF

44.8 KB Created: 2021-06-04 02:18:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 76ee9944d153635bbf08380b634b6cee SHA-1: dd6e89fd32778f60f97cae18d94cb504f64be7d4 SHA-256: 3984b32ae1ed764e3913d1b01d84f013998c3b7220b83a51819d3c0bc5ca26c4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary URL identified as a malicious redirector. The document body and heuristic firings indicate a lure for game-related cheats or currency, likely leading to a phishing site or a malware downloader. 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/431946152/roblox-free-robux-website-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/tiktok-free-tools_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-3-steps_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-hack-without-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC6 25576 bytes
SHA-256: 7a3e3abf7b0ff8a6c13f602eb791ca7952bb4d98bb6eeaa869ac72d3dbdd4519
font_01_sfnt_off00008bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFC 18508 bytes
SHA-256: fbcd203c7e924a0ebec4ef4aa0eb55ec8b14d1abcc2767c4f5d3ad1ccc86f8e3

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