Malicious PDF — malware analysis report

Static analysis result for SHA-256 551d4aef1dc0b46d…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 01:06:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 362e048bb8df9448fa1c2f7c38efd4d4 SHA-1: 2503268116be32ca4163eccbd082ec48205e419b SHA-256: 551d4aef1dc0b46d3ec3e040a9d06a2b2ac1937644ff5006659347d36a011908
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, masquerading as game hacks or generators. The ML classifier strongly indicated maliciousness, and the document body confirms the lure is related to free game items. The primary attack pattern involves tricking the user into clicking a link that leads to a malicious site, likely for credential harvesting or further malware delivery.

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/marshmello-roblox-t-shirt-free-game-hack In PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-get-free-clothes-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-arsenal-free-vip-server-2021_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/pass-roblox-hack-tool-txt_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/when-pokemon-go-free-will_GM1094591345.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-do-free-robux-sites-scam-you_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/robux-for-free-kids-in-25-seconds-no-verifying_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/best-free-minecraft-hacked-client_GM479516143.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_off000031f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F0 22324 bytes
SHA-256: 3a38d5075c40ccb55580c8f22a927fe997ad7e1a61fa9c9617cd5be8aec99f60
font_01_sfnt_off00006371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 19496 bytes
SHA-256: 850568e701a180325834aa4aafaffec9167ad2c4c01a56d7574550752aa807be

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