Malicious PDF — malware analysis report

Static analysis result for SHA-256 011f5c480cbdefd6…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 21:46:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4bd3d0d69c2c2aa5c13fe06ef06cde94 SHA-1: 9a173536810130539df3c32e7bbd493640dcc558 SHA-256: 011f5c480cbdefd6d431715dcb318bb505fc974bfd21bb67cc5505ddc4aa055f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the links and the lure suggest an attempt to redirect users to a malicious site, likely for further exploitation or credential harvesting. The document body contains obfuscated text and URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/wurst-game-hack In PDF document text
    • http://www.fluidtech.hu/images/moonactive-coin-master_GM406889139.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/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/robux-adder_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://youtuIn PDF document text
    • https://playhack.in/minecraftIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46ED 24608 bytes
SHA-256: 1bb9cbc2b52e30a221210c0c33e2bc890fe72f4a3bc835ca7d9108223f0bb215
font_01_sfnt_off00007e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7A 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00008820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8820 17556 bytes
SHA-256: c7eba0d35d3482de39ce9cd640884e3a275f5f00d67f8fb5d6d0debc1aa3211b

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