Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb74e72067bcedb…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 14:54:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b065ed83001dac7b5707c7e6762db8c0 SHA-1: 331e56c21768e55c5727aac85baaf89e10509ef8 SHA-256: 9fb74e72067bcedbccbe35ea4d34b47598c5f683692aaa2974fcf1481da48c8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising a "free generator / game hack" for Minecraft. The presence of multiple malicious redirector links and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful sites. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it's a lure for further malicious activity, possibly involving the download of additional malware or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/minecraft-java-edition-free-download-game-hack In PDF document text
    • http://kingmusic.pl/images/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/spin-link_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-robux-hacker-us_GM431946152.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_off00004a0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0D 25972 bytes
SHA-256: a0f66992f1504d5f9cf1714b9cbe1871acf0c47892771a82d408d374f57472b6
font_01_sfnt_off000085ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BA 18572 bytes
SHA-256: be0be2e0bd1478f571662982334261f36152068b9a395b749ff064ff651796b1

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