Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc91e58ed006713e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 10:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5a358cc945afbf183efd444f1bac5ae8 SHA-1: c30c78bca24fc4c22e5eb5f569491bb7709d0706 SHA-256: fc91e58ed006713e2ebae875bd1e9fe2a69879be524e563de2edfd307a3c7177
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to malicious infrastructure, specifically advertising game hacks and free currency generators for popular games like Roblox and Coin Master. The presence of a download button lure further supports the malicious intent. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-but-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-hack-como-tener-robux-gratis-2021-nuevo-truco_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-free-downloader-igg_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-a-roblox-server-and-save-it_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-hack-week-mirror_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-be-naked-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/greenville-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-lab-experiment-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/anyway-to-get-free-robux_GM431946152.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
font_00_sfnt_off00002fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDC 22264 bytes
SHA-256: 8e89a292803be9361e9628361e8d0bf73d1eca3842a017587782086393230f5c
font_01_sfnt_off000061b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B0 18728 bytes
SHA-256: 95eea618166f8a6785b6a40ac83c50df9d126f189dd236c8e138cb2b7f46439e

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