Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d898079b08070be…

MALICIOUS

PDF

46.8 KB Created: 2021-06-04 00:44:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 586827f0dd740e59a53e4a6bc95b8d58 SHA-1: 22461b73aefd483a991e8dd68cf46e8cd3cf6b14 SHA-256: 9d898079b08070bed1b57496dc020ed40128809bd2ee5648e2a2a79b948824db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising 'Coin Master Free Spins' and other game-related cheats. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which likely leads to further malicious activity or scams. No scripts were extracted, but the presence of malicious links and the lure pattern indicate a high likelihood of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/406889139/coin-master-free-spins-1-coin-master-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-win_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/300-daily-free-spins-coin-master_GM406889139.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_off0000522f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522F 25100 bytes
SHA-256: ebf608fadc1c1744aabebc4f11395e4f13d46a814d66444c89741014b5ce9fe2
font_01_sfnt_off00008b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1C 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000094ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94CE 17992 bytes
SHA-256: 6d8d99a319dc3508354c514a9dfb36b9314a67d789b860417dc5e127b03e5453

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