Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d84a1c4fe468b9f…

MALICIOUS

PDF

37.4 KB Created: 2021-07-06 21:04:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d2898b3b41640c0b7d2fe851ba47caa6 SHA-1: b662e2651e461f7783f6150323557ec0eebffac3 SHA-256: 8d84a1c4fe468b9fca3aaa98d9bc392460ee49c6e99d3496089609bbce7475bf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a lure for game hacks. The document body and extracted URLs indicate a phishing attempt to trick users into downloading potentially malicious software disguised as game cheats. No scripts were extracted, but the presence of embedded links and the lure of free game hacks strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/minecraft-windows-10-free-with-java-game-hack PDF link annotation
    • http://www.duchem.ae/uploaded_files/userfiles/files/roblox-xray-hack-download_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-robux-scam-messages_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/roblox-install-free-mac_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-hack-a-account-with-btools-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-robux-without-human-verification-2021-september_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/top-5-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-avatar-roblox-girl_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/create-roblox-faces-free_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/roblox-play-free-online-no-download_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/20-free-spin-link-coin-master_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_off0000378c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x378C 23528 bytes
SHA-256: d9f4c215a8c48969cb54dbcf2628689e157a566882417abaad33eb33ed2a3378
font_01_sfnt_off00006ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCC 19256 bytes
SHA-256: 0962a3ef6155743e3b186a790cdec45821d78640f98d60abfc6623c3622a453e

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