Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57cb125ea7801a7…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 21:29:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8a1d4b011f320ee3c5da4062e1322121 SHA-1: ddc946a99040ff7ca256067fa41b71ab365e7a20 SHA-256: f57cb125ea7801a7655b50b3c86ddbd98fdf608a2901fef1b5177ec2a7447273
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure for game hacks and free spins, likely intended to trick users into downloading malicious payloads or visiting phishing sites. The embedded URLs and the nature of the lure indicate a common tactic for distributing malware or conducting scams.

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/coin-master-free-spins-apk-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-open-cheat-engine-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/ruso-icu-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-free-auf-poki_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/csgo-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-invincibility-cheat_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-btool-command-without-hacks_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robux-hack-club-no-survey-or-download_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/games-like-roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robuxglobalcom_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_off000031dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DD 22940 bytes
SHA-256: 03b6ee7c5a061427bd5c838feae41c781fe14f5e3010b4a189237d9e6f5d26f3
font_01_sfnt_off00006582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 18344 bytes
SHA-256: 1dbe0fcba05c02502e584b0e7ffab6a4f048fc487afe950fa18a3df4b6395c6f

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