Malicious PDF — malware analysis report

Static analysis result for SHA-256 b658af1fce25c2fe…

MALICIOUS

PDF

45.7 KB Created: 2021-05-14 05:35:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e5c197b10cf46c2a9058c9aed884b110 SHA-1: 14d16ba1ef990835660df01b3f4ccf9d0ef91393 SHA-256: b658af1fce25c2fedb4a1846214ded952db1f4bfdd36ee9b111a9fa895c58dc6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free spins, directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or redirection attempt. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/406889139/free-spins-coin-master-2021-game-hack PDF link annotation
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/robux-gratis_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_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_003_off00004bfc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFC 24240 bytes
SHA-256: 32eff3cb8404cdc82f7d9c59fa244e01f34cacfdc9350a0ff25bd9f5013b7bbd
font_01_sfnt_off00008354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8354 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD9 18288 bytes
SHA-256: 9732707b45c862b7a6ef8ea2418900def9be3650c6b325207d932644f64622ad

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