PDF malware analysis — malicious · 5098e9015c299cd6

MALICIOUS

PDF

45.4 KB Created: 2021-05-15 13:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 4c98c1ce0a543ace7fe245e6cdd9abb5 SHA-1: 304b1dccd9c9f9876e3f713bcfeb93d83da2ef6d SHA-256: 5098e9015c299cd63c4348ead59a28cc021337360f945fdc5f92b0acf669cc4a

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using the guise of free game currency and hacks to trick users into clicking malicious links. It contains a primary redirector URL and a large number of embedded links to other PDFs, likely part of a link farm or SEO manipulation scheme. The document's content and structure strongly suggest a phishing or scamming attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

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.xyz/app/406889139/free-coins-and-spins-coin-master-game-hack In PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-roblox_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-apps-that-work_GM431946152.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_off00004b5c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B5C	25336 bytes
SHA-256: `4eb324808fecd49eb9a5f8f79eec7568f7310ef066291b62116872e3966b53fc`
`font_01_sfnt_off000085a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85A8	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008f93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F93	18060 bytes
SHA-256: `f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120`

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