Malicious PDF — malware analysis report

Static analysis result for SHA-256 b166c2d90df73174…

MALICIOUS

PDF

45.3 KB Created: 2021-05-16 18:33:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b27cc31598eaf851a67b3679b0670a42 SHA-1: 9b2be50ca0e0b11899c682126f2fcd931e209102 SHA-256: b166c2d90df73174cc8f434512313303da0e8f132ea2b0400642da0dd81c8901
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to a 'free generator / game hack' lure. This link points to known malicious redirector infrastructure, indicating a phishing or scam attempt. The document's content and embedded links suggest it is designed to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/431946152/free-robux-no-human-verification-or-survey-2021-game-hack In PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/robux-robux_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/roblox-c9m_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.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
font_00_sfnt_off00004a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A96 24784 bytes
SHA-256: c7dafaa625506ae2e6078f096393a5e5218337de446a8b4ac949447fdb1e3850
font_01_sfnt_off000080f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F0 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00008a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8F 19556 bytes
SHA-256: 08b2a18d96b3566ec838f0e87c4bb916e955b8f8af04b9064418114d078945b8

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