Malicious PDF — malware analysis report

Static analysis result for SHA-256 957af07c0a72a803…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 19:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f6246b6077ae0a5f6551e00976ce69fa SHA-1: 1b4405b9bddbbe49ee5c9244f5ba51463352ede3 SHA-256: 957af07c0a72a8032efcb912aaa13ebab3c64eda4c53a8677177c06b743104eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and potentially malicious PDF files, disguised as game hacks and generators. The document body and heuristics indicate a lure for users interested in free in-game currency or hacks, which is a common social engineering tactic. The primary malicious activity observed is the redirection to external, untrusted resources.

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.tw/app/431946152/robux-apk-game-hack In PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-clothing-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/games-like-bloxburg-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-codes-get-robux_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-scripting-educarion-for-roblox_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/hack-roblox-kill_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/picture-roblox_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-arsenal-hacks-mobile_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-blue-tatoo-free_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/annoying-orange-costume-free-on-roblox_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
font_00_sfnt_off00002ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDD 22308 bytes
SHA-256: e405a54013c647a81b6955a952d4acd30d08a5dcbfe0eabec1ad4bc170765864
font_01_sfnt_off00005f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 18896 bytes
SHA-256: d6fe5a9ee6cd38a3f7fd000d6a8081505603ed5c53f6d64f924d6cd3550e503f

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