Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7c6a95c6602592…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 12:33:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e147638ac8ddbf54dbb7d96d0553008e SHA-1: c88338f67d0bf61cdd037b0f8c9e57deb4feef11 SHA-256: db7c6a95c6602592ed18965b877b799562c488e67641c1844aca569cfc443879
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a lure for 'free generator / game hack' content. The document body, though partially garbled, contains text and URLs consistent with a phishing or scam attempt. The embedded link directs to 'netcdn.online', which is flagged as malicious, likely serving as a gateway to further malicious content or exploits.

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/406889139/coin-master-free-spins-gratis-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-youtube-tiktok_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-accounts-with-robux-that-work-2021_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_off0000508b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x508B 25060 bytes
SHA-256: 50000b032c1748a42ea94c9fa06a349138eea8b4191ced1f34dc70c9b0ddccf2
font_01_sfnt_off0000893b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893B 17884 bytes
SHA-256: 61e0f30a550a552155c2db6a7959ee396d6a34ca680bb4676c065f633eb1cbfa

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