Malicious PDF — malware analysis report

Static analysis result for SHA-256 8441d077639ac115…

MALICIOUS

PDF

40.8 KB Created: 2021-05-19 15:47:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0c2e34daaf18213d77e397818c590d3d SHA-1: 5a3833c04cc9ffeec53101485f1a65532d430495 SHA-256: 8441d077639ac1152222b6478a827c911c6025c93711a3c0a4360b825aff65b9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to game-related freebies, indicating a link farm designed to attract clicks. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a 'download button' lure further supports a malicious intent. The primary goal appears to be directing users to potentially malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-games-game-hack PDF link annotation
    • http://finettifrs.it/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/roblox-source_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://finettifrs.it/images/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://finettifrs.it/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://finettifrs.it/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://finettifrs.it/images/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off000046dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46DD 24176 bytes
SHA-256: 7f3dc54c92b290f2547143c2a3d1a9062cfdc4ce989b394553fa20f6934fba72
font_01_sfnt_off00007dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFE 18068 bytes
SHA-256: 7abae181ec6c66ffd27198a669e23e0067e6b479babf35f1da060866a57e87c6

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