Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab59d77506f3bb8…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 15:33:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a5ac93219d11977550bdf461c88525a8 SHA-1: ab4da2f2fa3c7314689a702817ccafbe3d0dcdd3 SHA-256: 6ab59d77506f3bb8fe1d7816339710656ee90bb8b7f3afb55230cd050464593c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to a known malicious redirector disguised as a game hack generator. The document body, though partially corrupted, contains text related to game hacks and includes the same redirector URL. This suggests the primary purpose is to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

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/406889139/card-hack-for-coin-master-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-on-xbox-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-particle-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/can-you-get-hacked-on-roblox-with-2-step-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-pubg-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-scam_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/tiktok-free-games_GM835599320.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-and-tix-youtube_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-on-people-roblox-account_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-gift-card-codes-2021-unused_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_off00003119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3119 23264 bytes
SHA-256: fa9abd985f052f3c43d293f60e4de637782df15114ee211df5427b30eefea3f3
font_01_sfnt_off00006588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6588 18340 bytes
SHA-256: 7e1b9b7afe785ea56b208f87ef5cc21a9c6d298372275f75dfcc7ab1e7e9a91c

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