Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bfbf00feabc144d…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 08:47:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b2f5051c95e02331c324ec57fcce72ab SHA-1: 0261f7c695081b06ece8e68cff0f13156090591e SHA-256: 7bfbf00feabc144d2500e164d6c5fd28cb9cfa9647c93aef011bd85d861ec8fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a malicious domain, disguised as game hacks and free spins. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure reinforces this. The primary attack pattern involves tricking the user into visiting a malicious site via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/coin-master-code-for-free-spins-game-hack In PDF document text
    • http://www.rewaqousha.net/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/tiktok-free-mode_GM835599320.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/cheat-codes-for-bank-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/www-roblox-com-free-robux_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_004_off00004e02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E02 24612 bytes
SHA-256: fdb75d5c41c9fc0a6e2440769a015abaf9456219cd05d6e55c83f61dba2663e5
font_01_sfnt_off0000866c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866C 18060 bytes
SHA-256: 4a03a9d44c164768d834a7fabe993e3d55008b9c253aea1e1300b795f74bd62a

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