Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f3cdf9acfb027c…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 04:20:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: dc83363c1cad2915ea46e53bb6a715ef SHA-1: 0f0ba2bae991d42b224b97dfe30d660f8819de51 SHA-256: d7f3cdf9acfb027cc4fa9ccc1b2f5f747eefe63b4445aae06f1acbc0029d49c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector URL, which is flagged as malicious and associated with game hack lures. The document body text reinforces this by mentioning 'Hack Scritp Inputter For Roblox Hacks'. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting malicious sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-scritp-inputter-for-roblox-hacks-game-hack In PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/como-descargar-hack-en-roblox_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/pokemon-go-free-gift_GM1094591345.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/robloxian-roblox-hack_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/pubg-uc-avatar_GM1330123889.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/i-want-robux_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-roblox-hack-no-download_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-links-2021_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
font_00_sfnt_off000031db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 22228 bytes
SHA-256: f8b705c318242d8ea33cf27f635b04c897f206994de4214e754598a12a7aa21c
font_01_sfnt_off00006343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 19360 bytes
SHA-256: 3f1b8c04d178ba9aa1b4c3cd2c81e444f41ae4c339ee48382912a4a739f42567

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