PDF malware analysis — malicious · 64bc91302849f698

MALICIOUS

PDF

40.2 KB Created: 2021-05-16 22:58:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 46bf309436787b8925ac84039040757f SHA-1: 497336c6a0ed782dcc8b18fa6a069d81de5279cd SHA-256: 64bc91302849f698b4d316e451c9236282ac79720cef20c5308cdee990e7964a

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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-mighty-lion-card-game-hack PDF link annotation
- https://www.air-shop.cz/images/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/10-robux_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/free-robux-games_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/free-robux-just-click_GM431946152.pdfIn PDF document text
- https://www.air-shop.cz/images/android-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
- https://www.air-shop.cz/images/master-free-spin_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004400.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4400	23676 bytes
SHA-256: `9a150a74f8e09af6e11a854da670949531885217a14b36bcf042122ad1a3c977`
`font_01_sfnt_off000079cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79CC	18520 bytes
SHA-256: `a8a505ee64c519446e881638ed0b205df0e717af229dba22b1218c448543a2a8`

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