Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97238d69e0617a4…

MALICIOUS

PDF

44.7 KB Created: 2021-05-16 12:22:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f01027b39c4350af1d448722f6c0e0ca SHA-1: 2ab0225968ec43dfe6a8d728bdaeb9d0711ab347 SHA-256: b97238d69e0617a4c7f3b06c065cff6c1a90e2bbdd7ec8bd61627a60bbfeef25
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs, with a primary link identified as a malicious redirector leading to a 'coin master hack tool' lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous similar URLs related to game cheats and hacks suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack aiming to trick users into downloading further malicious content.

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/406889139/coin-master-hack-tool-without-verification-game-hack In PDF document text
    • https://audev.com/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://audev.com/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://www.audev.com/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://audev.com/images/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://www.audev.com/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://audev.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/collect-robux_GM431946152.pdfIn PDF document text
    • https://audev.com/images/rewards-roblox_GM431946152.pdfIn PDF document text
    • https://audev.com/images/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/body-roblox_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://audev.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://audev.com/images/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://audev.com/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://audev.com/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://audev.com/images/coin-master-heaven-free-spins-link_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000476f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x476F 25424 bytes
SHA-256: 5c69ecdccd415483be6c900454cc279ef0347b349c2c6b5c13528a46cf8d6d43
font_01_sfnt_off0000817a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817A 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B94 18428 bytes
SHA-256: 0d4d1d3c8b3a8d9a8bf2514a91debdfd463a95143a55049788bc4d3b9a66685d

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