Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ed61bcbb2ca157…

MALICIOUS

PDF

37.7 KB Created: 2021-07-05 05:01:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ac202e17024e160e075f396c5c63fdd8 SHA-1: a2977b0fdd14848ca6c239c5580dabae0a37a37f SHA-256: 89ed61bcbb2ca15755db3113e3cbd307c4367ccfadc2d00abb33de94668d31d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games like Roblox. The document body, though partially corrupted, contains references to these lures and embedded URLs. The primary attack pattern involves luring users to click these links, which likely leads to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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-avatar-maker-free-game-hack In PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-no-hacks-gliches-or-troll_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/cheat-roblox-elemental-battlegrounds_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-a-free-ite-2021m-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-lcoins-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-2021-easy-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-youtube-roblox-locus-hacking-my-sisters-acount_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/eupo-fun-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/pokemon-go-free-864_GM1094591345.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-para-conseguir-dientes-gratis-en-sharkbite-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-zone-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-canada_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-id-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/http-blackgamesus-coinmasterhack_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
font_00_sfnt_off0000393a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x393A 23360 bytes
SHA-256: 1c51c9c31107e10156eafe0254024b3feda50ee0aefb8bcfa57987622e23be0f
font_01_sfnt_off00006dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 19236 bytes
SHA-256: 6e0682d0e3debb2d4c4c9a17f2eb9a9f2fd830994e30009324975d898f503a12

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