Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5a1f980f32e3b1…

MALICIOUS

PDF

49.5 KB Created: 2021-06-11 05:48:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 07b519e921b19034de59bb7679cbee09 SHA-1: 0991cdab4df767bbc5c3aff00e8acbd5ae570a8d SHA-256: 7f5a1f980f32e3b13dd6dd1a43353b30ebd7a29328096e28d52d1032c4c42509
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' or 'free generators'. The document body and heuristics indicate a lure to trick users into clicking these links, which likely lead to further malicious content or downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.tw/app/431946152/how-to-get-free-robux-ipad-only-2021-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/tiktok-free-music_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-venerator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-spins-on-coin-master-hack_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005134.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5134 28068 bytes
SHA-256: 805491bca528cdab9071b6b9e6804e5417d4075d3e9d7a41d1ddac0c9cadf3de
font_01_sfnt_off00009153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9153 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B02 19516 bytes
SHA-256: 0ac84b54b18b427bbeb7228efc5dc34485d95abe93007f6e80880af0fb523535

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