Malicious PDF — malware analysis report

Static analysis result for SHA-256 93beda470c8e435f…

MALICIOUS

PDF

35.5 KB Created: 2021-07-08 11:50:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7fb2ceb37799f42e2f1a29f9b32b9f50 SHA-1: 962145c08003b0fc00a294d1362ff662a34374ed SHA-256: 93beda470c8e435fc82d2db71db9820b24d6cdc17af9c89ff938403ab3e6386d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appear to be game hacks or generators, but which lead to a malicious redirector. This redirector then points to a large number of other PDF files, likely serving as a link farm for SEO manipulation or further malicious redirection. The ML classifier strongly supports the malicious nature of this PDF.

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/how-to-hack-roblox-2021-game-hack In PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-wall-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-by-robux-king_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/code-de-cheat-roblox-simulator-de-chiens_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-cheat-madcity_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/como-hackear-counter-blox-roblox-offensive-en-espaol_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/robux-online_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/bimsqa-complex-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/can-you-hack-roblox-anymore_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-ios-hack-no-jailbreak_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-unlimited-robux-hack-is-legal_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_off0000323e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323E 22760 bytes
SHA-256: 8f72ce9015c02e918d8ad5eb8bc23cca7efaefb7a2496f559e9b1e2a965229b2
font_01_sfnt_off000064d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D1 19224 bytes
SHA-256: 952aa56c448a3876108b271681fe1a59f9d49131b8b4cd095e69c290d9073af5

Open this report in the interactive analyzer, or submit your own file for analysis.