Malicious PDF — malware analysis report

Static analysis result for SHA-256 358e72489edd244d…

MALICIOUS

PDF

53.3 KB Created: 2021-06-04 03:05:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e4528480cdaabc25cf5e48f7d843edd8 SHA-1: c234fd985804cb968727fcd1c559168599bd08ff SHA-256: 358e72489edd244d92e33192ddeca6ed857a9405c538717c6cb9e9be7e2d6630
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The document body and heuristics indicate a lure to download potentially unwanted or malicious software. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

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-hacked-version-download-game-hack In PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/is-pokemon-go-community-day-free_GM1094591345.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_off000053ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53AC 33564 bytes
SHA-256: 05792bb81157987fc462e82fde79978d25713d7fd219fda8ec3a4275fff94bdf
font_01_sfnt_off0000a1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E9 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off0000abd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABD4 18940 bytes
SHA-256: 045b97c0477fa0a77fe25df190f3dc8d91b636a592878cab4dc6788bf6280dbe

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