Malicious PDF — malware analysis report

Static analysis result for SHA-256 6874676612ea7b0a…

MALICIOUS

PDF

37.2 KB Created: 2021-05-11 15:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 79b6e2941b8eb28fce1bbda2b692e920 SHA-1: 07cfde488af5f93efe1965d5a8c409ac18349f2b SHA-256: 6874676612ea7b0a9e66f6bfb02a5b97f49650d3a7ef757065b8c7b4ae65e455
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a "free generator / game hack" lure, aiming to trick users into downloading further malicious content. The ML classifier strongly indicates maliciousness, and the presence of multiple redirector links reinforces this assessment. No scripts were extracted, but the document's structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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/free-spins-and-coins-coin-master-links-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ca1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA1 25532 bytes
SHA-256: 8f3e9b4b87366477c7299197ff9b1d20245b35d4c122df85db62200c22afc5b0

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