PDF malware analysis — malicious · ed5049a3c42791bd

MALICIOUS

PDF

47.9 KB Created: 2021-06-13 19:42:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 007bc70e9c39974efdb3bb58d1acd069 SHA-1: a091b462cc660ece46f31449d56163617c667b60 SHA-256: ed5049a3c42791bd70af8c39f5a3e958b78401de616a07cb1f27eb49e4baa616

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to redirect users to malicious infrastructure. The document contains numerous links to external PDFs hosted on a compromised website, which in turn link to a known malicious redirector. The primary goal appears to be driving traffic to potentially malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

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/rbx-free-robux-game-hack In PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/uirbx-club-roblox-robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-free-robux_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/pokemon-go-free-on-pc_GM1094591345.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-ftw_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/real-robux-generator_GM431946152.pdfIn PDF document text
- https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-reward-links_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_003_off00004b2f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B2F	29860 bytes
SHA-256: `96d2456746f1456badb076d62926ed81a1dd51b784fea53374ce9328d8adfbf0`
`font_01_sfnt_off00008f22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F22	2984 bytes
SHA-256: `889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc`
`font_02_sfnt_off0000994d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x994D	18200 bytes
SHA-256: `ddd37c3b2fa686acce6c2a3c2ceddf9a56a39c36e5e1dfb8773daba355b1b632`

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