Malicious PDF — malware analysis report

Static analysis result for SHA-256 881047014067e94b…

MALICIOUS

PDF

43.2 KB Created: 2021-06-09 14:31:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: de419fdbb0eabfa57b427532f4a664d2 SHA-1: 629a4009113eb12bc9b2b29583a14255f21aec45 SHA-256: 881047014067e94b8331e533a36ad7a18c5f61a6c591d3d81dc45389a1e11627
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links disguised as game hacks and free currency generators, a common lure for phishing or malware distribution. The embedded URLs point to suspicious domains, and the document body, though heavily obfuscated, contains references to 'free robux' and 'game hack', reinforcing the lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/are-free-robux-streams-legit-game-hack PDF link annotation
    • http://pengolahan.perpus.wima.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/furious-crafter-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-cheat-download_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/como-tener-robux-gratis-sin-hackear_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/play-coin-master_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-spin-hack-without-verification_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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005192.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5192 27168 bytes
SHA-256: 9018a2453abc4a180cb12a7395126d5743c6976b0c9cfcdd370515cfa378eb4a

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