Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc43640bda816f8…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 06:49:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0582aa4a5130a6f7fdf53ef76f70a9a0 SHA-1: 621bc93be896350dc4ed57d6b7a4fed7de25fd34 SHA-256: 7dc43640bda816f8fac54edfd61818aca41f2284bba81920fb2007e9ad5dca56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/how-to-look-cool-for-free-in-roblox-game-hack. This URL is presented as a 'game hack' lure, suggesting the document's purpose is to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness.

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/how-to-look-cool-for-free-in-roblox-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-someones-account-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-free-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-catalog-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-money-limited-tk-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/games-that-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-tix-factory-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-codes-xbox-one_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/good-watch-dogs-hacking-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3249 22928 bytes
SHA-256: 8a54ed0945af6e8f33a2474f5ec2024ee15c4cd1b51978ae1da5fae370193ab9
font_01_sfnt_off0000657e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 18984 bytes
SHA-256: 968025b6b5429b110395d11f4a8da0c0f42a575efdc8ce9fa84c97b9439bc074

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