Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41a300525eb1e31…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 12:28:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0b9b73a7adbb51c158888fb2fc6b84f8 SHA-1: aa55e5bbebf9c3fc8c373ac7d1d52daafd4efdcd SHA-256: d41a300525eb1e31adaa50752f83b961684eae30225c8f8a2e7a88c61e9e2c89
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them, promising free game currency or hacks. The primary link redirects to known malicious infrastructure. The document body and extracted URLs indicate a scam related to popular online games, likely aiming to redirect users to phishing sites or download malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-robux-no-human-verification-or-survey-2021-game-hack In PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-free-book-wings-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/roblox-t-short-free_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-i-get-robux-free_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/cheats-for-dungeon-quest-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/roblox-walk-through-walls-cheat-engine-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-july_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-roblox-accounts-whit-gamepassed_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_off00002fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE4 22672 bytes
SHA-256: d3b9f194e3d869e80dc0fdf3f1c5d39f167dde772c8eecfbf3ea1d197bef2726
font_01_sfnt_off000062b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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