Malicious PDF — malware analysis report

Static analysis result for SHA-256 249f52feacc76b8d…

MALICIOUS

PDF

43.6 KB Created: 2021-05-11 23:34:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 410a024e25a83189d2a41098778c9d16 SHA-1: 14ac5100af54f6ba0a079fdbeaa755f6ec082b90 SHA-256: 249f52feacc76b8dffeb77c1797c8428f0f8755fc6157658983a53d6c09593cd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are structured as SEO-friendly slugs pointing to PDF files. This suggests a link farm or SEO manipulation tactic. The presence of a download button lure and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/is-minecraft-free-on-nintendo-switch-game-hack PDF link annotation
    • http://loriginedupain.org/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/generator-robux_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E3A 25280 bytes
SHA-256: f1ce47591d994320453086d56f23f97660c0d18a193bf99e048b6173fa821d83
font_01_sfnt_off00008877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8877 18212 bytes
SHA-256: 88833f0f37aaf816a00c97530fc90e87f2df28a22611e5c00792867ae98cdb6c

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