Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a6693f963341451…

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 03:12:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 81a62c62d22fbb992055e7eacae26dd9 SHA-1: 7622bd46f128cd4859360c9586535c895b8ad89f SHA-256: 4a6693f9633414514a1ae1c64d16a1b7c63652a3245118578fc4cb54d3c6ffc5
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and SEO link farms, masquerading as game hacks and generators. The primary lure, 'Roblox Place Rewards', directs users to a URL associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/roblox-place-rewards-game-hack In PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/watch-ads-for-robux_GM431946152.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_003_off00004cd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD8 24856 bytes
SHA-256: fa837e1ae9a909f5f8707b6edf26273e4d25bbdb8f0ed984b42b7f24798e9665
font_01_sfnt_off000085f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F8 18504 bytes
SHA-256: a91422b40b1f0e9b25312e0f225173307c9cda4ba1c84b6eb7c88c6311770e07

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