Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7f09c916a3f535…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 22:13:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7fdc35f99c7b1082b2124bf727600d85 SHA-1: 2e6e0e21f5ed916e5198628d39794a14c4a8f3d8 SHA-256: 9a7f09c916a3f535ee8738d0be77df3ad449bb83bb94fef09abc2c7ce7b33471
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free Robux generators or game hacks. The heuristic firings indicate that these links are part of a known malicious redirector chain. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-no-verification-2021-android-game-hack In PDF document text
    • http://suaedy-library.net/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.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_004_off0000501f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501F 24036 bytes
SHA-256: be599fe651943bf138221033ce5b708dc6c25e029707e6ae111f1c755179cf57
font_01_sfnt_off000086fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FE 19176 bytes
SHA-256: 2db8195158682863467aa5049c27493158ce29af4e73d213a7d216c5b0c72741

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