Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed11ad831f1781a5…

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 04:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ad273f045ebacbb9ec2c769ff0b9c9ad SHA-1: 543e7515ab99f41e97be5d997653e1112d216ef1 SHA-256: ed11ad831f1781a574d3c3f07ebad934d680d349f17d1e1b02af875c771c32b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering 'free Robux' and 'game hacks', a common lure for malicious activity. The ML classifier also flagged this PDF with high confidence. The primary IOC is the redirector URL, which likely leads to a further malicious payload or phishing page.

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/431946152/can-you-give-me-free-robux-game-hack In PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/easy-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-coins--spins-coin-master_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_off000048d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D9 25808 bytes
SHA-256: 64d5a42600669d1dbc4e752d41c8c0751bb81fba83301f2e951aa7035f6c5f87
font_01_sfnt_off00008565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8565 18836 bytes
SHA-256: f7ef8038c45e68508aae9bb0b63a3af28c92eee5ac21090050d85675c825651a

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