Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21290a0e81ae633…

MALICIOUS

PDF

42.6 KB Created: 2021-05-10 22:41:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 157f9530b0ea07c346a2c7fab10e3dc7 SHA-1: de9bd54480018b5d1a8b903b217f43b7efe82460 SHA-256: c21290a0e81ae6330189a61a16ce21e8e446dd1260856b22f0e6dd7aa48a018e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as offers for game hacks and generators. The document body explicitly mentions 'how to download minecraft for free' and includes a URL that aligns with this lure. The presence of numerous links to potentially malicious domains suggests an attempt to redirect the user to a site that may host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/how-to-download-minecraft-for-free-game-hack In PDF document text
    • http://florentineholding.com/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://florentineholding.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://florentineholding.com/images/coun-master_GM406889139.pdfIn PDF document text
    • http://florentineholding.com/images/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • http://florentineholding.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://florentineholding.com/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://florentineholding.com/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://florentineholding.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://florentineholding.com/images/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://florentineholding.com/images/coin-master-free-spins-link-download-free_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_off00004b59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B59 25552 bytes
SHA-256: ef51b3620b334bd705bda894c19ae726531b05f2b6820eeed19313c7f269cfea
font_01_sfnt_off00008447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8447 18292 bytes
SHA-256: 99621570461cd7d06d3aeee2d5a7201c5e27378a0102ff29a57c60fd25da4758

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