Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fdecae13073e0a…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 02:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 813124d23fa3a59bbf1ccf6f246bdc89 SHA-1: 6a053ce0172584588c668c3a9d305b32b65c0032 SHA-256: 90fdecae13073e0a0bbcda85ad2510e986ec699eb2f4ff07735e6429c6a4edb1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free Robux, which is a common lure for malicious redirects. The heuristic firings indicate these links point to known malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it's designed to lead users to potentially harmful content.

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.co/app/431946152/how-to-earn-robux-free-2021-game-hack In PDF document text
    • http://perpus.polimarim.online/repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hacks-for-bit-slicer-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-spawn-stuff-in-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-cheat-engine-64-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-hack-no-fake_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-accounts-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-forsaken-sword-3-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/funny-free-roblox-outfits_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_off00003173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3173 22304 bytes
SHA-256: 11da18d06ebf69711c1f882b0531c3b2d0154c5bdc54c06d0e359313b3def951
font_01_sfnt_off0000630e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 19284 bytes
SHA-256: b399ae733d7917559aeb38653f56690fc8d0842846df9d5376906f0eed96920f

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