Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc823b02809f1294…

MALICIOUS

PDF

44.6 KB Created: 2021-05-15 04:13:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8218aec625be155528cf94e9abbbd2cf SHA-1: 9c59218c2090ccf16e538b3421a036c9607337f8 SHA-256: bc823b02809f129497b890662ab2da4b3b16c4e5caba8fe696cc2363375c397c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free generators. The embedded URL https://netcdn.xyz/app/479516143/best-minecraft-hacked-client-game-hack is identified as a malicious redirector. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to lead the user to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/479516143/best-minecraft-hacked-client-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-coin-app_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/no-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004785.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4785 26184 bytes
SHA-256: 86005fbd43645c4d7e4ed24fc83baf4de48390a7118922ca6326cd35c9198cca
font_01_sfnt_off00008182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8182 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off00008c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2C 18200 bytes
SHA-256: 05f9c4237b996275e109c4becad50b5cb7d88affc4d3e55964976ee2f9eee8f2

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