Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2dc2f23daa87ce…

MALICIOUS

PDF

42.5 KB Created: 2021-05-13 02:06:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fd9f44d702675328a0f6e22053ecca91 SHA-1: 51e588c9ce8b5fa676a60527194f3a4fb432858e SHA-256: ef2dc2f23daa87ce0dc5da73f9e19ad3a788cb56c5655c48d5b29a9a27d2459e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator" or "game hack" lures. The primary malicious link identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-facebook-game-hack. The document body, though heavily obfuscated, contains references to similar lures and embedded URLs, reinforcing the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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/406889139/coin-master-free-spins-facebook-game-hack In PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-minecraft-codes_GM479516143.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
stream_003_off00004bdd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BDD 24740 bytes
SHA-256: 53ba7f9ae95cff9e9e119efddca0b2fa82561e4decc2550cb65703d74f8031fe
font_01_sfnt_off000083ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CA 18212 bytes
SHA-256: a7d0484bdc545634c9b46f4dcbf794c30064c3aaaf3cdd537b213ac19f08a95c

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