Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8425f45dde02b7…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 05:27:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 494e31043c49eeb96b70ad405693b898 SHA-1: 3151bfc4acfa30252f8d94cef5855c64efddee37 SHA-256: ac8425f45dde02b7c90e8674f94c077b64e3cc94a68d5390a4da4e9bda3276ff
220 Risk Score

Malware Insights

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

This PDF document contains multiple links to external websites, including a known malicious redirector. The content and linked URLs suggest a lure for game hacks and cheats, likely intended to lead users to phishing sites or download further malware. The PDF structure and embedded links are indicative of a malicious redirector chain designed to obscure the final malicious destination.

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.co/app/431946152/top-10-best-free-t-shirts-in-roblox-game-hack In PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-get-level-200-hack-gears-online-roblox_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/roblox-retro-craftwars-script-hack_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sepl.net.au/uploaded_files/userfiles/files/coin-master-free-spins-daily_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
font_00_sfnt_off00003223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3223 22140 bytes
SHA-256: 351efc9afe7641ef6eee07b5a4aed105136b0e240a62ffbb1c4e035da7131071
font_01_sfnt_off00006301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 19528 bytes
SHA-256: f7bbdac2fe5f9af7e4b6306c476d596d0b553541edcda13a935911d8aba004db

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