Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d331653c894963…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 23:12:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b4fb343d757b3681514ab828cee8fd4d SHA-1: 124d220414a9efb1c96c11ddf071decb76ceb5de SHA-256: 84d331653c894963b21fb99c42a47acca09f315964690aa7e2b2398beb7663ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/1094591345/pokemon-go-free-items-code-game-hack PDF link annotation
    • http://krumerhaus.at/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/pubg-uc-voucher-code_GM1330123889.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-coins-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
stream_003_off00004851.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4851 24804 bytes
SHA-256: 75817f30bb146edffcd70a72507474a3e720a1aecbe67addccc5a1fccb05e7d4
font_01_sfnt_off00008181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8181 18120 bytes
SHA-256: 584cc096bac67891003bc126dd362810905b331c80dc7a4776bf6d3a790e34d6

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