Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cd187222894c60…

MALICIOUS

PDF

45.6 KB Created: 2021-06-07 17:09:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1c22a0edad4fcd5c042e382c9edc9996 SHA-1: 367961305db195cbd127611e9a148080ffc75373 SHA-256: 28cd187222894c602dceab0531b35d6af70ede9d0caca16a97c64b074d56b520
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and a link farm, indicating a phishing or malware distribution attempt. The document body and extracted links suggest a lure related to game hacks and free items, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of numerous malicious links strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/best-hack-gui-roblox-game-hack In PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/hack-para-obtener-robux-gratis_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/is-tiktok-app-free_GM835599320.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-top_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000548a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x548A 25392 bytes
SHA-256: 8b866595553cec27c4ef5c25c7e7279e7bf320210760924be256dd3a97a16b2b
font_01_sfnt_off00008eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAB 18544 bytes
SHA-256: 31aa94fdd4007db1724b7bd02fb39fc5dd9f4393dd54723f920a38c3e56300a0

Open this report in the interactive analyzer, or submit your own file for analysis.