PDF malware analysis — malicious · 96eb0c2a11218731

MALICIOUS

PDF

49.5 KB Created: 2021-06-03 09:20:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 5d6eff4e1b1ab233e40af6ff02764384 SHA-1: 4c8bedea0abbe623484786286863fbd6c1e9123d SHA-256: 96eb0c2a112187318334674c08bcdc673bba361cf4d8425d6421a97d74eb45aa

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links to websites that appear to be part of a link farm or redirector infrastructure, specifically promoting 'free Robux' or game hacks. The document body and heuristics indicate a lure to external sites, likely for phishing or scam purposes. No scripts were extracted, and the primary malicious activity observed is the redirection to potentially harmful URLs.

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/431946152/how-to-get-free-robux-without-doing-anything-2021-game-hack In PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/pokemon-go-free-game-online_GM1094591345.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
- https://www.punnitohana.com/uploaded_files/userfiles/files/free-2021-robux_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_004_off00005483.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5483	26612 bytes
SHA-256: `451e973b6597405244b3e63204ae97bff50667e119a6d72240dfc2234dde476b`
`font_01_sfnt_off0000905b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x905B	2812 bytes
SHA-256: `fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f`
`font_02_sfnt_off000099fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99FC	19804 bytes
SHA-256: `7de61e10f8b36a8651a25a8843179e8b1ecc4bebcf46d2f81f98618caa29dc1a`

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