Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2779d404e46a1c…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 09:21:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 210d69aeec20535c3e86d0ef89a28745 SHA-1: dcc72e003e0a144e50b9af710bf917be54f71400 SHA-256: 3f2779d404e46a1c3b8f9d1e82439e2509b342968eef31351976a7dfe85d7f84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically promoting 'free game hacks' or generators. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake offer for in-game currency or cheats, designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/rbx-free-game-hack In PDF document text
    • http://library.acehresearch.org/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coinmaster-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_004_off00004fa2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA2 24816 bytes
SHA-256: f61d84ad75a108e2d8c9f27d0f0ec970e27b31b46d8b5c05a2caa61118fe5616
font_01_sfnt_off00008847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8847 6768 bytes
SHA-256: fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a
font_02_sfnt_off00009886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9886 17732 bytes
SHA-256: 212f4f57de6c922282aa54d2f6f49c5eca850be9602afd8932fff094b4d72406

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