Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1e276b53b8df75…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 05:57:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9d370c1748a21c70406fc1e9b94bdeae SHA-1: 97a4a35cba718e9ba67979b0e137a1f2a66bee16 SHA-256: 8e1e276b53b8df7538217b8d97d8e9b1d5ad756e73e5c13b622aaa5984d9842a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are SEO-optimized PDFs promising game hacks and free in-game items. The primary link, http://netcdn.tw/app/479516143/can-you-make-a-minecraft-server-for-free-game-hack, is identified as a redirector lure. This suggests the document is designed to drive traffic to potentially malicious sites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/479516143/can-you-make-a-minecraft-server-for-free-game-hack PDF link annotation
    • https://htdvn.com/public/upload/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/mad-city-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-codes-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-with-guddinfo_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-roblox-bucks_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-without-survey-and-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-hack-me-robux-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/como-tener-hacks-de-armas-en-roblox_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
font_00_sfnt_off0000310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310C 22576 bytes
SHA-256: 8f2583625002fedb7f361111edcd6ba773b3b19f7fa0566dc6c61b3711f67b79
font_01_sfnt_off00006343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 18584 bytes
SHA-256: 03bb178e0c49e3568f2cf77d55a85f0b2c8e7efb79ff06b17784fbc7992a4997

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