PDF malware analysis — malicious · 2ec1eabe6251287a

MALICIOUS

PDF

44.9 KB Created: 2021-05-12 05:40:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: bd943c233cd59c996f4f5eded57892c9 SHA-1: 54ca40a22ba389a0fe294d20411f55d23dc29610 SHA-256: 2ec1eabe6251287a1258674dc90b2f506a95e69786c9b0bfaa3ebda2f7cefdc4

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links to websites that offer 'free generators' and 'hacks' for popular games like Coin Master and Roblox. The primary heuristic firings indicate that these links lead to malicious redirectors and are part of a link farm designed for SEO manipulation. The document body, though partially obfuscated, contains references to these lures and embedded URLs, suggesting an attempt to trick users into visiting potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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/coin-master-free-coins-hack-game-hack In PDF document text
- https://verstricktundzugenaeht.com/images/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/roblox-free-bundles_GM431946152.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://verstricktundzugenaeht.com/images/roblox-font-free_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_off00004c05.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C05	24788 bytes
SHA-256: `324322d5ec9bdfb76aa685ceac7f457509b76c512e010a297a36e430f30d4681`
`font_01_sfnt_off00008427.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8427	2944 bytes
SHA-256: `e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23`
`font_02_sfnt_off00008e52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E52	17880 bytes
SHA-256: `9d1f455011f0aa7862855f259ab9ea2efa3be9ec050c3ec97e4c793879e57b5c`

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