PDF malware analysis — malicious · 9627c7b64315fba6

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 08:32:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 2913c8596e09b0f82a2ae242c27d5482 SHA-1: ff66a3d42cb0374e9688b66bda701b0625530171 SHA-256: 9627c7b64315fba65e66b348b717f7fb6569f9ab71fc7c54d45a9b8b2d229196

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The document body and heuristics indicate a lure to click these links, which likely lead to further malicious content or downloads. No scripts were extracted, but the embedded links and redirector behavior are strong indicators of a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9797

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/coin-master-free-spin-link-app-game-hack In PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/pubg-uc-2021-online_GM1330123889.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/without-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/free-robux-no-inspect-no-info_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
- http://dndprinting.com/new/public/ckfinder/userfiles/files/free-spin-in-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_off00004e90.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E90	24640 bytes
SHA-256: `4e3e76d0400b7470549433d2a267b985e8cb571110c3e50c5b7f6b3a960c0a34`
`font_01_sfnt_off000085dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85DD	2820 bytes
SHA-256: `96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689`
`font_02_sfnt_off00008f7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F7E	18056 bytes
SHA-256: `82bd5e5fc9f9c8e10db102fb3f3c15aafc022ab197dd07e70821ea88e25dcd6f`

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