Malicious PDF — malware analysis report

Static analysis result for SHA-256 44794078f57c5783…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 21:17:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8a5020af8bbc7c3f2547f82d228003ca SHA-1: 310a381a7009c04d2f61af3d08c1c7ed494143e5 SHA-256: 44794078f57c57831886504f907af97b692acf1b7a6fcc4965b2eb8e0eb8f61f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game generators and hacks to entice users. It contains multiple links to known malicious redirectors and domains hosting similar lures, indicating a phishing or scam campaign. The document's structure and embedded URLs suggest it is designed to lead users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/1094591345/pokemon-go-free-and-ios-14-game-hack In PDF document text
    • https://kojak-group.com/userfiles/files/roblox-ban_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/tiktok-free-fans-cheat_GM835599320.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-attack-hack_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_004_off00004fc3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC3 24320 bytes
SHA-256: 84470267e2599f9dd7e2f89fd9934d25edb4ed2107c8998411df0ca04184d0a7
font_01_sfnt_off0000878c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878C 18184 bytes
SHA-256: 58a832f7e71235530b17b827e5841b841901efcdfdc801b8a4dd6c32eab4d188

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