Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f2c7202f1b6169…

MALICIOUS

PDF

36.5 KB Created: 2021-05-21 03:13:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ca7c0f3ccec46a9536fc988719ced069 SHA-1: efdffc6197b0e23e3e607f594ebb1c1ba6728970 SHA-256: 44f2c7202f1b61697f5cd8eee4a366f196d8385397cb1a4e5837bbdfde34454c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an invoice-themed lure. 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 0.9492

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/minecraft-server-hacks-game-hack PDF link annotation
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.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_002_off00003565.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3565 25236 bytes
SHA-256: 34a79d2d8a04acc5f130e1b46d4e4487b2a7a0a9ab6352e17b457099e4bad3b0
font_01_sfnt_off00006ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 17852 bytes
SHA-256: d08e9f99218473ecffc4f3e4fddc043c571e48cf04331ee5ff23a4dc6866f563

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