PDF malware analysis — malicious · 8f6a9199fe0f4439

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 14:08:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 1388575954f473560468946fadc25e60 SHA-1: 1a2a1cdef9ee61a6560a3d46839fc642ac8c050b SHA-256: 8f6a9199fe0f443954cf7a6686fb56fc1a7c81bb8a3c3ae36956fac517a8b934

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-related hacks or free currency generators. These links lead to a malicious redirector and an SEO link farm hosting numerous other PDFs, indicating a campaign to drive traffic to potentially malicious sites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

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/406889139/coin-master-20-free-spins-link-2021-game-hack In PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/2021-free-robux_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-hack-a-roblox-account-password-2021_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-free-stuff-hack-robux_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-roblox-project-pokemon-codes_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-cupcake-hack_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy_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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000354a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x354A	22544 bytes
SHA-256: `1a869c41e8a33fd1808c40960e3e945e4c7574d98d281389d13c264c1b68cb5d`
`font_01_sfnt_off0000676d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x676D	18748 bytes
SHA-256: `2fa519299f8a2165e5faef35be9d47acb7f717a213bb0fe22b3fbdc2136af6a5`

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