Malicious PDF — malware analysis report

Static analysis result for SHA-256 5137f0880f83e354…

MALICIOUS

PDF

35.0 KB Created: 2021-06-23 00:39:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ea564180d1cd0438f52c31bc2ff79499 SHA-1: 6b244b95441175c5bbea8fef980264407986c720 SHA-256: 5137f0880f83e354518c0ff7ad4e0ce43f76d11ed07e403bc70834fa2c648cb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game items and hacks, directing users to a known malicious redirector. The embedded URL, http://netcdn.co/app/431946152/when-will-more-free-items-come-to-roblox-game-hack, is designed to lead victims to potentially harmful content or further malicious downloads. The document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/when-will-more-free-items-come-to-roblox-game-hack In PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/jailbreak-geld-cheaten-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/pin-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-planet_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/redeem-credit-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-car-simulator-hack_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-make-a-minecraft-java-server-for-free_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
font_00_sfnt_off0000307f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307F 22484 bytes
SHA-256: 1939152ff10f6b50c7a49ba5ed2d9d283a66c3f0dfd1020ec50e2419cd4dc3d7
font_01_sfnt_off00006237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6237 19696 bytes
SHA-256: 20b7346027a1a940fedf040ccf035e8056d9f528305c1ae4e0f595c951823fde

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