PDF malware analysis — malicious · f1d92c78b28107ee

MALICIOUS

PDF

48.9 KB Created: 2021-05-13 08:34:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 54cdd2b4b11e1ea1932fcae8b98c4dac SHA-1: 81f8ab800c20ed66a12a7b1b70241634900b4b7a SHA-256: f1d92c78b28107ee3ed97b227d5a35bc1361a572cf6ac80bb43f8f02f5ba4bdc

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users to malicious websites, masquerading as 'game hacks' or 'free generators'. The primary redirector URL is https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-human-verification-game-hack. The document body and embedded link structure strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9228

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/431946152/how-to-get-free-robux-without-human-verification-game-hack In PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/free-roblox-svg_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/free-spin-coin-master-2021_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_off00004ec1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4EC1	26256 bytes
SHA-256: `27b77f722ea3030844da0b39c0ad5c087be33e8b8c9a13cef7360af2be9c7b42`
`font_01_sfnt_off00008c4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C4F	3992 bytes
SHA-256: `43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd`
`font_02_sfnt_off00009975.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9975	19388 bytes
SHA-256: `c7994a70f951e7a274445218605a0e5dad46067da7d3a89c75279f94e76bcfde`

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