Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4756d9bdac70f2…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 19:48:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a6742ee28e28e3e78c5b375004656aee SHA-1: 96fecaea50b55530d891cf31809a6bbc44705919 SHA-256: fe4756d9bdac70f2e749c8facc44e7d83cbd0015e7bedd328180958bfa0cd81a
200 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and free items to trick users into clicking a link. The link leads to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The presence of a fake CAPTCHA heuristic further supports the intent to deceive the user into executing an action that leads to compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/479516143/minecraft-on-computer-free-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-a-account-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-earn-free-spin-in-coin-master_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_off00002f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F51 22072 bytes
SHA-256: 35753ad4e31615f70c03fcc7bf5e5843447202ffeb9fc96c30ffdb6342fd5791
font_01_sfnt_off00005fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE0 18576 bytes
SHA-256: 7513e646e321e05ee14e7c487dba2482799d5320eb3bae11c9c2836e863cbe91

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