Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9d53eba155965c…

MALICIOUS

PDF

31.7 KB Created: 2021-05-16 16:15:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e1da89e9c6214a4c3a1b299dfa4e8e23 SHA-1: d87602570a611546e5c7bdba6bb1c563f00bc479 SHA-256: dc9d53eba155965ccaa293d425830a8a2f3af9f46354eaf48a6f24e09f4f5027
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious link disguised as a "free generator / game hack" lure, which is a common social engineering tactic. This link redirects to known malicious infrastructure, indicating a phishing or malware distribution attempt. The malformed stream length heuristic suggests an attempt to hide malicious content within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/431946152/free-robux-earn-game-hack In PDF document text
    • http://ladagoterie.fr/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-free-food-for-pet_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_off00004935.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4935 24872 bytes
SHA-256: ee54c439ff21d6937d716f8e80a2baa8b80b0e068f7e3c63aeaed6bb419c10e9

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