PDF malware analysis — malicious · 6af0095713f02d4d

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 15:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: ff4dc052ce71ba0911508da8be0c8546 SHA-1: 07239536f0120426cb68156fe35820ea78dddc9d SHA-256: 6af0095713f02d4d2e46315928681f98240dc4916410508157fb63c14042bb4d

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users to external websites, masquerading as generators for game currency and hacks. The primary redirector URL, https://netcdn.online/app/406889139/free-coins-coin-master-blog-game-hack, is flagged as malicious. The document also functions as a link farm, directing users to a large number of other PDF files hosted on jcn.co.uk, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/406889139/free-coins-coin-master-blog-game-hack In PDF document text
- https://www.jcn.co.uk/uploads/files/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/actual-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-money-hack_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-rules_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000050f9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x50F9	27040 bytes
SHA-256: `0693fcd8e128f207d2e83596098ba566ee73c276348bdc49f2ecfa8136d75a4d`
`font_01_sfnt_off00008e37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E37	3380 bytes
SHA-256: `1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57`
`font_02_sfnt_off00009a1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A1F	18288 bytes
SHA-256: `525699ae71861fffeab431a07c950b4914d38a871fb98becad0e0bea9ac3f1df`

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