Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f90dec792b3e475…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 15:05:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 64f0c9fa3e8ba1c41f4578b216899777 SHA-1: 6ad2f99a210a92ec49cb2d9a16a18155f282f491 SHA-256: 8f90dec792b3e475851dd597b107b7f981f316df84a5ddea5f6c11b6b1174033
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a prominent link disguised as a game hack or generator, which is a common lure for phishing or malware distribution. The link redirects to known malicious infrastructure, indicating a high likelihood of malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a malicious site, likely for further payload delivery or credential harvesting.

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/imes-space-roblox-hack-game-hack In PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/pubg-uc-deducted_GM1330123889.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/redeem-robux-free_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-free-modeler_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-mad-city-hack-red-boy_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-peoples-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/can-u-get-insta-banned-in-roblox-for-hacking_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/thebuxian-you-have-robux-try-hack-today_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/people-on-roblox-who-give-free-things_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-games-online-like-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-link-today-2021_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFE 21932 bytes
SHA-256: 3b6baa7df2501e9a441c1166c5853ff2ddd7f15e784615640513c83b3ec87218
font_01_sfnt_off00005ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFC 19092 bytes
SHA-256: fda068999d257819bf71075794652c259ab8e24f6e1d2a1fe6563acaa537c07f

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