Malicious PDF — malware analysis report

Static analysis result for SHA-256 58411c7218e15ee7…

MALICIOUS

PDF

50.0 KB Created: 2021-05-11 03:36:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9f058a8c3a2b574c37ca2840a91ea344 SHA-1: 66a9d257482bcd13571827a561d314c2e8c38806 SHA-256: 58411c7218e15ee7d175497cc6e9f0131006df7b3970497cbb24be5153008c48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically targeting users with lures for game hacks and free currency. The document body and heuristic firings confirm the malicious redirector links and the lure-based attack pattern. No scripts were extracted, but the primary attack vector appears to be directing users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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 https://netcdn.xyz/app/406889139/coin-master-free-coins-link-2021-today-game-hack In PDF document text
    • http://www.fluidtech.hu/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/spin-coin_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/moon-active-games_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/2021-free-spins-coin-master_GM406889139.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4E 26056 bytes
SHA-256: 0dec4f96cad3329d9581f3cb546b7fd1ffc358d0fd4189990c4ffab3ae3aff49
font_01_sfnt_off000089ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BA 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off000094e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E4 18636 bytes
SHA-256: 54ee628be55815102d4fd2b2c16d0cf2d83f73b68c782c007c481b291bfa8535
font_03_sfnt_off0000b824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB824 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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