Malicious PDF — malware analysis report

Static analysis result for SHA-256 398cd93b15cb805a…

MALICIOUS

PDF

46.9 KB Created: 2021-05-12 04:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 72b9d122c23d428b5bdce2e0075af795 SHA-1: 8491e337d6531ef00fefa44e379ca9dab21094a7 SHA-256: 398cd93b15cb805ab89a4aaa746a057216354af0e1fcb45314b7543e77a70c27
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/479516143/free-minecraft-texture-packs-java-game-hack PDF link annotation
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn 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_003_off00005099.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5099 25844 bytes
SHA-256: 0f6b3b723772b1c5eda41cc2d20acfa034aa63749682bc16d0a0ba415e169ef0
font_01_sfnt_off00008aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA4 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00009463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9463 18520 bytes
SHA-256: 686fb3e1785c5679fc7febae081669fb57112988378368078b360718af0d5a6a

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