Malicious PDF — malware analysis report

Static analysis result for SHA-256 40de0a95f2a49189…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 05:36:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 25f6ca6ac87dd74ee2f9bb6e14f6f0e7 SHA-1: ad71f4f7479bad6f712acbf0f5461f9580908ebb SHA-256: 40de0a95f2a491894cf8bdd45c85f387d4faac3fc18b232e20b38ca5a5c32de5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, masquerading as free game hacks or generators. The ML classifier strongly indicated maliciousness, and the embedded URLs are indicative of a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-domain-for-minecraft-server-game-hack In PDF document text
    • http://unionmusicaldebenidorm.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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
stream_003_off00004af9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF9 24824 bytes
SHA-256: 6113c0338b53b43cb84b45323ccc67dd33d746ef603e8e47078fcb668f358aa7
font_01_sfnt_off00008389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8389 18252 bytes
SHA-256: 7978d84717849f7fe583135464e7fa2f965b05bc02f62d7a17151b102e6c088e

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