Malicious PDF — malware analysis report

Static analysis result for SHA-256 757c17ae67ab1f8c…

MALICIOUS

PDF

41.8 KB Created: 2021-05-19 22:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 36b0822750c21b2312545e2a18997377 SHA-1: 915a9e300574aec9d9b8dafe1350dcc5cce2f1aa SHA-256: 757c17ae67ab1f8c5bb26f8e61f630471431268a285109c47e1d04bd683c7808
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures related to game hacks and free spins, indicating a phishing or scam attempt. The embedded URLs suggest the document is designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious intent to trick users into visiting malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-link-game-hack In PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.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_003_off00004ae7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE7 25128 bytes
SHA-256: 2979fb7b535da54513576c0013008d66797139f1039e2e64a1d3a6b6854b200b
font_01_sfnt_off000082c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C3 17716 bytes
SHA-256: 6b6be525affa70ffc107ac4c88dd9d04ef97920621a7989faf1a85e6391895c0

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