Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c454dbbcf18d352…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 23:06:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a5b0a075b64b38d3de7d57b15d468149 SHA-1: 69d5d8a60ffc0306121023fc5762df7af0258f19 SHA-256: 3c454dbbcf18d35295e34e0d0e13ee7bc414d2ac140a3f625bef2290e6d0cb0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to known malicious redirectors and infrastructure, specifically advertising 'free generators' and 'hacks' for popular games. The document body, though partially corrupted, contains similar URLs and text suggesting a lure for users seeking cheats or in-game currency. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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-apk-game-hack In PDF document text
    • http://perpus.polimarim.online/repository/free-gift-card-codes-generator-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/boku-no-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-new-account-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-html-adfly_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-tiktok-followers-without-human-verification-2021_GM835599320.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-100_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-5-free-robux-doing-nothing_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313A 22676 bytes
SHA-256: 4b9d9731295f0243c4ae416a75080a801f1a3aba655013783265fa13606b448a
font_01_sfnt_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 18180 bytes
SHA-256: ccb4bd86540267ecf8d8b16f9ef9319d477a0690c534ef42a6f6fd2086dc6ea9

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